S varies directly as R varies and T varies inversely as R varies. At a time R = 20, S = 40 and T = 1

Shashank Gupta   9 years AGO

S=k*R
1/T=k*R
=>S/T=k*R
40/10=k*20
k=1/5

When Value gets changed
40/T=1/5*10
Hence T=20

Like? Yes (7) | No (2)  

PRAGATHI G   9 years AGO

when R is changed to 10. implies R decreases by 10. since T varies inversely to R. T should get increased by 10. that's 20

Like? Yes (4) | No (1)  

adarsh   9 years AGO

t varies inversely to r then so t= 20

Like? Yes (3) | No   

Mugesh sivagnanam Krishnapillai   9 years AGO

The multiplication factor between S,T & R is 2
Since R and T are inversely propostional.,
T=10x 2=20.

Like? Yes (3) | No   

kriti kankariya   9 years AGO

as given T is inversly prop. to R
at first R=20 , T=10
now, R=10 i.e. 1/2 of previous
so T will be doubled, T = 20

Like? Yes (5) | No (3)  

jayaram   9 years AGO

here T and R are inversely praportional.then here R is decreased to 10 implaise T is increased to 20

Like? Yes (2) | No   

KALA BHANU PRAKASH   9 years AGO

If R=20 then T=10&
If R=10 then T=20.

Like? Yes (2) | No   

R.DIVYA    9 years AGO

R value is reduced to half i.e 10. Since S is directly proportional to R, its value is also reduced half i.e 20. Since T is inversely proportional to R, its value is increased to half i.e 20.

Like? Yes (2) | No   

sandeep prasad   9 years AGO

if R=20 and T varies inversely as R varies so if R=10 then T=2*intial T...=10*2=20

Like? Yes (2) | No   

swati sharma   9 years AGO

R/S=20/40 = 1/2
S.T=K WHERE, K is a constant =>(40).(10)=K
WHEN R=10, => S=20
ST=K=400
20*T=400
=>T=20

Like? Yes (2) | No   

Abhinandan mahato   9 years AGO

r is half therefore t will be double that is 20

Like? Yes (2) | No   

priyanka burnwal   9 years AGO

accod. to ques
let x be variable
s=rx so x=40/20=2
t=x/r
so x=200
t=200/r
t=200/10=20

Like? Yes (3) | No (1)  

gouselazam   9 years AGO

T1R1=T2R2
(10*20)/10=20

Like? Yes (2) | No (1)  

rahul shaw   9 years AGO

R=x/T
R=20 AND T=10
x=200
WHEN R=10 THEN T=20
So option 1

Like? Yes (2) | No (1)  

vikash kumar   9 years AGO

10=k/20.
k=200.
now t=k/r
t=200/10
=20

Like? Yes (1) | No   

Aman Gaurav   9 years AGO

we know that S is directly varies with R and inversely varies with T
so,
if R become half then S also become Half and T become Twice
.
so T = 20

Like? Yes (1) | No   

Aman   9 years AGO

we know that S is directly varies with R and inversely varies with T
so,
if R become half then S also become Half and T become Twice
.
so T = 20

Like? Yes (1) | No   

Harsh Saxena   9 years AGO

There can be 2 ways:
R = K/T
R=20, T = 10, so .. K = 200
Now, R is 10, so T = 200/10 = 20...

OR

Directly.
S = kRT
k = 1/5
now R is changed so T = 20

Like? Yes (1) | No   

nidhi   9 years AGO

T is inversely proportional to R.
Therefore, T= k/10, 10=k/20, k=200. now, T=k/10=200/10=20

Like? Yes (1) | No   

Rajyalakshmi   9 years AGO

as T inversely varies then it becomes twice of R

Like? Yes (1) | No   

abhishek   9 years AGO

calculate the constant from the equation
T=K/R
put T=10,R=20

then K=200
the equation becomes T=200/R
put R=10

T=20

Like? Yes (1) | No   

meghana   9 years AGO

T varies inversely as R varies
so RT=constant
RT=R'T'
20*10=10*T'
T=20

Like? Yes (1) | No   

vikash kumar das   9 years AGO

as R=kT,where k is constant,putiing R=20 and T=10,we calculate the value of k.
Now putting R=10 n k=200 in T=k/R,we get T=20.

Like? Yes (1) | No   

akshay jain   9 years AGO

T is inversely proportional,if R is havled than T get doubled

Like? Yes (1) | No   

Gunjan Sharma   9 years AGO

As per question,
S=@R.....(1)
T=&/R....(2)

when R=20, S=40 and T=10 then @=2 and &=200.
When R changed to 10, then T=200/10=20 (Ans).

Like? Yes (1) | No   

sudiptaa   9 years AGO

S=pR
p= S/R = 40/20=2
T=q/R
q=TR=20*10=200
. ' . R=10 ; T= q/R= 200/10 = 20

Like? Yes (1) | No   

Aritra Chakraborty   9 years AGO

R inversely related to T. RT=k, say. R=20, T=10 => RT=200 i.e. when R=10, T=200/10=20.

Like? Yes (1) | No   

nirmal das   9 years AGO

as R varies inverse as T... then T=k/R..when R=20 and T=10 then k=200...if r is changed to 10 then T will be 20...

Like? Yes (1) | No   

Alok Singh   9 years AGO

If S is proportional to R
then according to the question S = K1*R then K1=2 So S=40
and as R=k2/T
then if K2=200 then T=10
so there will bw the value of T will be 20 when R=10

Like? Yes (1) | No   

Karthik   9 years AGO

R decreased by 10 which is half down
so T increases by half

Like? Yes (1) | No   

JITIN   9 years AGO

R is directly proportional to S and T is inversely proportional to R
i.e.., if R is increased or decreased ,S wud also be inc or dec in same ratio
here
R is divided by 2 so S will also divided by 2 but T will be multiplied by 2 cuz both T & R are inversely prop.
so,
S=20
R=10(given)
T=20

Like? Yes (1) | No   

Soma Naresh   9 years AGO

given T is inversely proportional to R
T=m/R
TR=m
given T=10, R=20
m=TR=10*20=200
If R=10
then T=m/R
T= 200/10=20

Like? Yes (1) | No   

kondapuram tirumalreddy   9 years AGO

Since R and T are inverse proportional
R is reduced to half
so T shoulde be icreased by double

Like? Yes (1) | No   

sarang pandey   9 years AGO

r changes from 20 to 10,-- s changes from 40 to 30,--t changes inversely with respect to r so r decreased by 10 t will increase by 10 so answer will be 20

Like? Yes (1) | No   

akanchha pandey   9 years AGO

bcz r=r/2=10
if t is inverse to r then
t=20

Like? Yes (1) | No   

marline   9 years AGO

T and R are inversely proportional. If R= 20 when T=10 then T must be 20 when R=10

Like? Yes (1) | No   

Sourabh Prasad   9 years AGO

ST/R is constant.

so 40*10/20 = 20*T/20
T= 20

Like? Yes (1) | No   

Gaurav Pratap Singh   9 years AGO

T is inversly propitional to R.
T became half so R became double.
Answer - R became 20

Like? Yes (3) | No (3)  

payal   9 years AGO

since r and t s inversely proportional to each other
if r=20 then t=10
if r=10 then t=20

Like? Yes (3) | No (3)  

TAUSEEF AMEEN   9 years AGO

As T is inversely proportional to r.
let K be proportionality constant.
then...
T=k/R
Putting R=20 and T=10
K=200......1)
now again T=K/R
putting k=200 and R =10
T=20
hence option 1 is correct ans

Like? Yes (4) | No (4)  

velmala gangadhar   9 years AGO

S=kR and T=c/R...we have R=20,T=10
Then constant c=200...
if R is changed to 10..so..T will be 20.........

Like? Yes (2) | No (2)  

Mousuma Roy   9 years AGO

40=k*20,k=2,10=(a/10),a=200,r=10,10=(200/t),t=20

Like? Yes (1) | No (1)  

MANUPOTI ANAND   9 years AGO

R1T1=R2T2
S0,T2=(R1T1/R2)
=(10*20)/10
=20

Like? Yes (3) | No (3)  

venkatesh   9 years AGO

T is inversely proposonal to R
T1*R1=T2*R2
T2=10*20/10
T2 =20

Like? Yes (1) | No (1)  

Gaurav Verma   9 years AGO

T inversly proportional to R
=> T=K/R .......(1)
taking, T=10,R=20, we get k=200
Now, putting values of k and R in (1). we get,
T=20

Like? Yes (1) | No (1)  

Kunal nemu   9 years AGO

S/TR is constant.
So, 40/20*10 = 40/10*T
T = 20

Like? Yes (1) | No (1)  

shilpa prakash   9 years AGO

S DIRECTLY R TINVERSLY 1/R
SO T=10 THEN R=20 WHEN R=10 T=20

Like? Yes (2) | No (2)  

Ramesh Sriram   9 years AGO

T1R1=T2R2
10*20=10*t2
t2=20

Like? Yes (1) | No (1)  

shivam dubey   9 years AGO

T inversely proportional to R

so r is become 10 then T become 20

ans

Like? Yes (1) | No (1)  

k sureshbabu   9 years AGO

R REDUCES TO 10
T GAINS 10

Like? Yes (1) | No (1)  

Amit chaturvedi   9 years AGO

According to question,
S ∝R and 1/T ∝R,
But S and R relationship is given just for creating confusion,
so so focus on T and R
If value of R is halved then value of T will be doubled
i.e 20

Like? Yes (3) | No (3)  

s.h.h.praveen   9 years AGO

s=kr and tr=p,where k and p are constants .
1)substitute the above values to know the constant values.
2)after that change the value of r to 10.we get the values of s=20 and t=20

Like? Yes (1) | No (1)  

Pesari Udayasree   9 years AGO

given that (s/t) proportional to r
according to the given values proportionate can be replaced as r=5(s/t)
now r=10, s=40, by substituting this we get t=20

Like? Yes (1) | No (1)  

Sandeep Kumar   9 years AGO

As given
S ~ R
So
S = k R ( k constant )
Also T ~ 1/ R ( inversely)
T = k/ R
Initially T = 10 R = 20
10 = k / 20 ; k = 200
Now
R = 10
T = 200/10; T = 20

Like? Yes (1) | No (1)  

Rahul Jadhav   9 years AGO

40=20=1/10
20=10=1/20

Like? Yes (1) | No (1)  

Rohit Agrawal   9 years AGO

S=k*R
T=m/R
R=20, S=20, T=10
=>m=200, k=2
at R=10
T=m/R= 200/10= 20

Like? Yes (1) | No (1)  

sanchit soni   9 years AGO

r halves and t doubles value

Like? Yes (1) | No (1)  

momin ashraf ahamed   9 years AGO

r1t1=r2t2 substitute r1=20,t1=10,r2=10

Like? Yes (1) | No (1)  

R.Shyaam Sunder   9 years AGO

since T is inversely proportional R,when R is decreased by 10 is increased by 10.Therefore T=10+10=20
T=20.

Like? Yes (2) | No (2)  

SK INTAJ MOHAMMAD   9 years AGO

S=K1*R and T=K2*1/R
K1=2 and K2=200
T=200/10=20

Like? Yes (1) | No (1)  

DEVENDRA PAL SINGH RATHORE   9 years AGO

R AND T ARE inversely SO

Like? Yes (2) | No (2)  

minakshi kumari   9 years AGO

s=2r
t=200/r

Like? Yes (1) | No (1)  

Vikas Jha   9 years AGO

rule of proportinality

Like? Yes (1) | No (1)  

santhosh   9 years AGO

s=xt
t=x/r

Like? Yes (1) | No (1)  

siddhi datri   9 years AGO

s=2r
t=200/r
=>t=200/10=20

Like? Yes (1) | No (1)  

Nilesh Kumar   9 years AGO

as t changes inversely of r

Like? Yes (1) | No (1)  

Niladrit Mondal   9 years AGO

since s varies directly with r
den s=kr
40=20k
k=2
now r inversely varies with t
r=k/t
20=k/10
therefore,k=200
now ,r=10
therefore t=k/r,t=200/10=20

Like? Yes (1) | No (1)  

baby posamma   9 years AGO

(s1/s2)=(r1/r2)=(t2/t1)=> (40/s2)=(20/10)=(t2/10)=> t2=20

Like? Yes (1) | No (1)  

himani kukreti   9 years AGO

T is inversely proportional to r , if r value will Dec then t value will Inc up

Like? Yes (1) | No (1)  

G MAHESH   9 years AGO

find constants k1 and k2,using given data ..and after that substitue new values to get answer

Like? Yes (1) | No (1)  

MUNISH YADAV   9 years AGO

s=k1r, tr=k2 Putting values we get k1,k2=2,200. Again put r=10,k2=200 in second equation to get t.

Like? Yes (1) | No (1)  

Kshitiz Khandelwal   9 years AGO

T varies inversely as R
Then
R is reduced by half, so T will be increased by factor of 2
so T will be 20

Like? Yes (1) | No (1)  

Subhendu Pradhan   9 years AGO

s=k1r,t=k2/r;
so, k2=t*r;
t must be 2 times of its value keeping constant the value of k2 while changing the value of r by half times

Like? Yes (1) | No (1)  

Rupkatha Banerjee   9 years AGO

As T varies inversely as R varies, T=K/R where K is a constant.
If R=20 & T=10 K=200
If R=10, T=K/R=200/10=20

Like? Yes (1) | No (1)  

Pillalamari Bala Sri Jyothi   9 years AGO

AS R DECREASED BY 10 , T VALUE INCREASED BY 10 MEANS 20

Like? Yes (1) | No (1)  

swasthika   9 years AGO

R=K/T (K is the constant of proportionality)

Like? Yes (1) | No (1)  

Deepanshu Chaturvedi   9 years AGO

let R=x/T so,from question 20=x/10 =>x=200
when R=10 value of T=x/R=200/10=20.

Like? Yes (1) | No (1)  

Anik Chaudhuri   9 years AGO

T1/T2=R2/R1

Like? Yes (1) | No (1)  

Abhisek Ghosh   9 years AGO

t varies inversely with r,if r is reduced to half,then t will be multiplied by 2

Like? Yes (1) | No (1)  

YASWANTH REDDY   9 years AGO

As R is inversely proportional to T, RT = constant.
new T value = 20*10/10 = 20

Like? Yes (1) | No (1)  

Deepali Tyagi   9 years AGO

R n T are inversely proportional i.e why for R= 10 .....T=20

Like? Yes (1) | No (1)  

MADHUBABU   9 years AGO

As T is inversely proportional to R
=> T1R1=T2R2
=> T2=(T1*R1)/R2
=> T2=(20*10)/10
=> T2=20

Like? Yes (2) | No (2)  

Paul Rohit   9 years AGO

S = x*R , T = y/R given that when R = 20, T = 10 so y = 200. Therefore when R = 10 then T = 200/10 = 10.

Like? Yes (1) | No (1)  

gourav   9 years AGO

t inversely proportional to r => r*t=constant. and when t=10 and r=20 then constant =200 and when r changed to 10 so t will be 200/10=20

Like? Yes (1) | No (1)  

Anurag Raj   9 years AGO

because T is inversely proportional

Like? Yes (1) | No (1)  

Parthasarathi.S   9 years AGO

T=c/R
10=c/20
20=c/10
=>T=20

Like? Yes (1) | No (1)  

RUPANJAN ROY   9 years AGO

as T varies inversely with r therefore TR=const,
T1R1=T2R2
10*20=10*T2

Like? Yes (1) | No (1)  

SOURABH   9 years AGO

s=x*r
x=40/20=2
r=k/t
k=20*10=200
10=200/t
t=20

Like? Yes (2) | No (2)  

Arpan Ganguly   9 years AGO

let s =kr and t=l/r where k and l are constant
if r= 20 and s=40 then easily we get k=2
and t = l/20 , and t is 10 so here l=20*t=20*10=200
r has changed to 10 so t will be
t=200/10 = 20 so option 1 is correct

Like? Yes (1) | No (1)  

Divakar   9 years AGO

R changed 20 to 10. It decreases by half(R/2). The condition is T varies as R varies.So T increases by double(10*2=20).

Like? Yes (1) | No (1)  

Vinit Patil   9 years AGO

T is inveresly proportional to R

Like? Yes (1) | No (1)  

praveendas   9 years AGO

the given condition is
s->r->1/t.
40->20->1/10.
if r is changed to 10 then s changes to 20,as it is directly proportional to r .t changes to20 as it is inversely proportional to r.
20->10->1/20.
option 1

Like? Yes (2) | No (3)  

aman aditya   9 years AGO

t=20

Like? Yes (1) | No (2)  

DURGESH KUMAR   9 years AGO

for t is inversely .. proportion constant is 200... then put value

Like? Yes (1) | No (2)  

shikha   9 years AGO

S=kr
T=k/r
10=k/20
20=k/10

Like? Yes (2) | No (3)  

shilpa singh   9 years AGO

S=kr
T=k/r
10=k/20
20=k/10

Like? Yes (2) | No (3)  

ankit chavhan   9 years AGO

K & p are constant
S=k * r
T=p/r
Given : r =20,s =40,t =10
Since , value of constant will always remain the same...
So, on solving we get

P= 200 and k= 2
Now r=10 and p=200

Therefore t= 20

Like? Yes (1) | No (2)  

Sudharsan   9 years AGO

s=4 times T

t = 200* (1/R)

Like? Yes (1) | No (2)  

aishi sur   9 years AGO

For R inversely proportional to T , 20 =k/10 so k=200

Next case R=10 so T = k/R =20

Like? Yes (1) | No (2)  

REVATHIVENKATESAN   9 years AGO

ST/R is constant.

so 40*10/20 = 20*T/20
T= 20

Like? Yes (1) | No (2)  

SHAIK MAHABOOB BASHA   9 years AGO

T varies inversely as R varies
so if R=20 then T is 10
R*T=1
20*10=200
If R=10 T=?
10*T=200
T=20

Like? Yes (2) | No (3)  

Ajay Kumar Gupta   9 years AGO

ST/R=Constant
so 40*10/20=20*T/20
T=20

Like? Yes (1) | No (2)  

BIRANCHI NARAYAN RATH   9 years AGO

s=c1*R
t=c2/R

solving k=2

solving in that way t=20

Like? Yes (1) | No (2)  

shubham singh   9 years AGO

T=k/R
i.e. TR=constant
therefore T=20

Like? Yes (1) | No (2)  

jyoti   9 years AGO

tvaries inversly ti r

Like? Yes (2) | No (3)  

ADARSH GAURAV   9 years AGO

20 is the answer

Like? Yes (1) | No (2)  

sukriti singh   9 years AGO

s proportional to r
=> s=xr, x is some constant.
=>t=y/r, r is some proporionality constant.
now at some point when, r=20 s=40 and t=10.
40=x*20
=> x=2.
similarily,
t=y/r
=> 10=y/20
=>y=200.
so when r=10
=>t=200/10=20. ans.

Like? Yes (1) | No (3)  

Abhinav Akash   9 years AGO

At present:R=20,S=40 , T=10 S directly proportional to R ,So Let K be the proportionality constant,So S=KR
K=2
T is inversely proportional to R so
T=C/R ( C be proportionality constant Say)
So C=200
Now when R is changed to 10,then T=200/10
i.e equal to 20

Like? Yes (1) | No (3)  

SHAHARBAN O   9 years AGO

T varies inversely as R varies. Here R reduced by 10 the inversely T will be increased by 10.

Like? Yes (1) | No (3)  

deepthi pusala   9 years AGO

since t varies inversely with r.r is decreased by 10 so,t should be increased by 10.

Like? Yes (1) | No (3)  

Pratiksha Gupta   9 years AGO

t inversely varies as R. So if we decrease the value of R then value of t will increase

Like? Yes (1) | No (3)