If 4 examiners can examine a certain number of answer books in 8 days by working 5 hours a day, for

Jaikumar Bhatia   8 years AGO

(M1*D1*H1)/W1=(M2*D2*H2)/W2
IF
M1=4
D1=8
H1=5
W1=1
&
M2=2
D2=20
H1=x
W2=2
THEN
(4*8*5)/1=(2*20*x)/2
x=8
Answer is x=8 hours
Option is (8)

Like? Yes (31) | No (5)  

Mridula Shaw   8 years AGO

4 examiner working for 8 days(5 hours a day)
thus,
1 examiner=8*5=40 hrs/person
Now,
2 examiner working for 20 days(x hrs a day) to have twice the work.
thus,2*x hrs spent each day
We need 160 hrs.Working 2 hrs the duration will be:
160/2*x=20
=>x=4 hrs
Twice work is done,thus,time=4*2=8 hrs.

Like? Yes (15) | No (1)  

Lakshmipathi   8 years AGO

m1d1h1/w1 = m2d2h2/w2
assume w=100;
4*8*5/100=2*20*h/200
h=8 hrs

Like? Yes (11) | No (3)  

Jay parmar   8 years AGO

If 4 examiners takes 40 hrs to complete a work then for same work 2 examiners take 80 hrs to complete
And if the work is doubled they will take 160 hrs
That means. 20 days ,8 hrs a day

Like? Yes (11) | No (3)  

Soumyaranjan Dalai   8 years AGO

(men1*time1*hours1*)/work1=(men2*time2*hours2)/work2
4men*8days*5hours/1work=2men*20days*hours2/2work
hours2=8

Like? Yes (4) | No (1)  

sachin sawant   8 years AGO

4 ex take-8 days-5hrs-to do 1 work
2 ex take 16 days-5 hrs to do 1 work
2ex take 20 days 4 hrs to do 1work
2 ex take 20 days 8 hrs to do 2 work

Ans- 8 hrs

Like? Yes (3) | No (1)  

satya   8 years AGO

In first case one examiner 1 day work is 1/32

whereas in 2nd case one examiner work is 1/40

difference is 8 days

Like? Yes (3) | No (2)  

Divyansh Jain   8 years AGO

4*8*5/x=1 => x=160

2*20*y/160=2 => y=8hrs ans.

Like? Yes (2) | No (1)  

Vipul Puranik   8 years AGO

m1*r1*t1/w1 = m2*r2*t2/w2
4*5*8/w = 2*r2*20/2w
r2 = 8 hrs

Like? Yes (1) | No (1)  

Sagar Wadjikar   8 years AGO

2 examiners twice pages 1hr = 160 days
so 10 hr = 16 days
for 20 days 8 hrs will be required

Like? Yes | No   

rishi   8 years AGO

1 teacher checks x book within 1 day in=(5*4*8)/xhrs
2 teacher checks 2x books in 20 days in=(5*4*8*2x)/(x*2*20)=8hrs

Like? Yes | No   

Santhosh Kumar   8 years AGO

The first certain no of papers can be examined by a single person in (8*5*4)=160 hrs

Hence a person need (160*2) hrs for completing twice the work

If it is to be shared b/w 2 persons time required for each person =(160*2)/(2)=160

No of hours to be worked for 20 days is (160/20)=8 hrs/day

Like? Yes | No   

G.S.Kantharao   8 years AGO

4 examiners - Let x papers - by working 5 hours per day for - 8days.
It means 2 examiners - x papers - by working 5 hours per day - in 16 days
If there are 2x papers the same 2 examiners can do by working 5 hours per day in 32 days.
If there are 20 days for the same 2 examiners for 2x papers they have to work = 5 x32/20 =8 hours per day. Hence right choice is 8.

Like? Yes | No   

sairam   8 years AGO

let us assume that 4 examiners can examine 40 papers in 8days working 5hours a day. each can examine 10 papers in 40 hours. so it will take 4hours for each examiner to examine one paper. now our question is in howmany hours 2 examiners can examine 80 papers working for 20 days.each examiner have to examine 40 papers. so for 40 papers it will take 40*4=160 hours. so they have to work 8hours per day to complete the work

Like? Yes | No   

Akhila Dumpala   8 years AGO

using the formula (Men *Days)/Work.
let us assume 4 examiners examined x answer books in 8 days for 5 hours a day. then 2 examiners should examine 2x answer books in 20 days in y hours per day.
(4*5*8)/x = (2*20*y)/(2*x)
will give us 8 as the answer.

Like? Yes | No   

T.uma maheswari   8 years AGO

let no.of books being examined be s
s=(no. of examiners)*(no.of days)*(no.of hours per day)
s=8*4*5=160
now for 2 examiners
hours of work per day H
2 s=2*20 H
H=2*4*8*5/40
H=8

Like? Yes | No   

JENSI KARUNYA.S   8 years AGO

let x=no of answer books
4*8*5=x--->(1)
2*20*h=2x---->(2)
simplify the two above equations (1) & (2)
h=8
so they work 20 days for 8 hrs per day
option 8) 8 hrs is the correct answer

Like? Yes | No   

Durgesh Pal   8 years AGO

Let there are x answer sheets.
Examiners= E
Total hours (days * hours/day) = H

4 Examiners can examine x sheets.
i.e x is directly proportional to Examiners.

x sheets can be examined in 40 hours ( 8days * 5hours/day)
i.e x is directly proportional to Total Hours.

Hence,
(E1 * H1)/x1 = (E2 * H2)/x2

(4 * 40)/x = (2 * 20*H)/2x

H= 8 Hours

Like? Yes | No   

M Narasimhulu   8 years AGO

4 mem 40 hours a work
2 mem 80hours a work
twice work for 2 mem 160
20*x=160
x=8

Like? Yes (1) | No (1)  

Abhinav Kumar   8 years AGO

Formula :
(M1*D1*H1/W1*R1)=(M2*D2*H2/W2*R2)

Where M = No. of persons ; D = No. of days ; H = No. of hours ; W = Work ; R = Wage/Money

Putting respective values in above formula, we get required time as 8 hrs.
( Note that here wage i.e. R is not given so we will not consider R in the formula .)

Like? Yes | No   

Rohit Saha   8 years AGO

total work = 320hrs which is to be completed in 20 days. so per day work is 16 hours

Like? Yes | No   

Amit Gurbani   8 years AGO

M1*D1*T1*W2 = M2*D2*T2*W1
4*8*5*2 = 2*20*T2*1
T2 = 8

Like? Yes | No   

G.Mounika   8 years AGO

As we know
M1D1H1/W1 = M2D2 H2/W2 let us take x as number of books
so we have
4*5*8/x = 2*20*y/2x
Y =8

Like? Yes | No   

KUMUD UPADHYAY   8 years AGO

man*hours*days must equate.
as in case two work in twenty days is double the actual work so for the actual work the examiners would have to work only for 10 days(20/2).
Let's take h as no of hours per day in case 2.
Now 4*8*5=2*10*h, and on solving we get 8 hours per day as the answer

Like? Yes | No   

gayathri   8 years AGO

4 examiners corrected a x papers in 5hrs per day
Per 8 days=40hrs
One person=40 hrs
For 4 =160 hrs
So, 2x papers will be corrected by 2 examiners in 20 days is
160hrs-x papers
2x papers-320 hrs
So,320/20=16 hrs for 2 members
For 1 member 8 hrs per day

Like? Yes | No   

Riya Prakash Ratnaker   8 years AGO

Let the no.of books be x
x=(no.of examiners)*(no of days)*(no of hours a day)
x=4*8*5
x=160

now the no of books doubled and examiner becomes 2,also days are 20

2x=2*20*H
2*160=40*H
320=40*H
H=8

hence 8 hours is the answer.Option (8)

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vikas   8 years AGO

4*8*5=160
double work means..320
so, 320/(20*2)=8

Like? Yes | No (1)  

Lenin   8 years AGO

no. of examiners -4, working hours a day = 5, no. of days =8
so, work done = n = 4 * 8 * 5 = 160 units.
so, for 2n=320 units, no.of examiners=2, no. of days =20

required working hours per day = 320/(2*20) = 8 hours.
option 8.

Like? Yes (1) | No (2)  

Shreeprasad Bhat   8 years AGO

total of 4*5*8=160 hrs of work
twice the work is 160*2=320 hrs
and for 20 days 320/20=16 hrs per day
with 2 examiners 16/2=8 hrs per day

Like? Yes | No (1)  

Gokul Krishnan   8 years AGO

(M1*D1*H1)/W1=(M2*D2*H2)/W2
GIVEN: W2=2W1
(4*8*5)/W1=(2*20*H2)/2W1
H2=8 hours

Like? Yes (1) | No (2)  

alka patel   8 years AGO

from above ques
4*8*5*2=2*20*x
x=8
here 4*8*5 is total men hours and it will be equal to the new equation when it is twice

Like? Yes | No (1)  

ANUJ KUMAR   8 years AGO

(e×d×h)/x=constant
e=no of examiners
d=no of days
h=no of hrs
x=no of sheets

Like? Yes | No (1)  

Dinesh kumar sah   8 years AGO

It is clear from question that more examiners than less time will be required,ie inversely proportion is happening here.
Let the x hours they have to work.
then 4:2 :: 20x:80
if we solve then we get x=8 hours Ans
hence option (8) is the correct answer.

Like? Yes | No (1)  

Sandip Das   8 years AGO

let say 4 examiner answer 100 question
4 examiner ans 100 qus 40 hr
2 examiner ans 200 qus (40*4*200)/(2*100)
=160 hours
20 days work 160 hr
1 days work 160/20
=8 hr

Like? Yes | No (1)  

Shashank Rai   8 years AGO

x number of copies require 40 hrs to complete the examining process by 4 people. for 2 people, 2x no. of copies will be completed in:- 2*2*40/20= 8 hrs a day.

Like? Yes | No (1)  

Kiran   8 years AGO

If p1 persons can do certain work w1 in d1 days by working t1 hours a day and p2 persons can do certain work w2 in d2 days by working t2 hours a day, then the formula is p1d1t1w2=p2d2t2w1 therefore, p1=4, w1=w1 , d1=8, t1=5hrs and p2=2, w2=2(w1) coz, twice the no: of answer books of w1, d2=20, and t2=? hence, 4*8*5*2 w1=2*20*t2*w1 w1 cancels both sides, and then t2=320/40 therefore, t2=8hrs a day. option 8) is correct

Like? Yes | No (1)  

Siva Raman R   8 years AGO

Let total work be x
in first case each guy doing x/4 of work.
for 1 person to complete x/4 of work it takes 40 hours.
in second case each guy is doing x of work ==> 4*40 = 160 hours. in second case they have to work for 160 hours,given that in twenty days,therefore working 8 hours per day
ans : 8

Like? Yes | No (1)  

mini atreya   8 years AGO

M*D*H/W

4*8*5/X = 2*20*H/2X
H = 4*8*5*2X/2*20*X
H=8 HOURS

Like? Yes | No (1)  

Nikita Singhal   8 years AGO

4 examiners can examine in 40 hrs
2 examiners can examine in 80 hrs
2 examiners can examine double answer books in 160 hours
to complete in 20 days, number of hours per day = 8 [total no. of hours (160)/no. of days (20)]

Like? Yes | No (1)  

RISHABH   8 years AGO

Let the no. of answer books be x
So, x = 4*5*8
Also, 2x = 2*20*h
So, h = 2*4*5*8/2*20 = 8
So, 8 hours is required

Like? Yes | No (1)  

Nishtha shree   8 years AGO

examiners time days work(answer books)
4 5 hr 8 1
2 x hr 20 2
.
. . 4*5*8 1
----------= ---
2*x*20 2
=>x=8 hr

Like? Yes | No (1)  

Pritam warule   8 years AGO

4(examinar)*8(day)*5(hr)*2x=2(examinar)*20(days)*hr*x

x=no.of ans book hr=hours
hr=8
ans=8)

Like? Yes | No (1)  

Prateek khanna   8 years AGO

Let answer books to be checked equals to x. X=4*8*5=160. Now, 2x=2*h*20. After solving we get h=8 hrs

Like? Yes | No (1)  

lalitha valeti   8 years AGO

work done by 4 = 8x5
let work done by two per day is a, then for 20 days it is = 20a
so total work done by 4 = 4x8x5
total work done by 2 = 20xax2
as work done by 2 is twice that of 4
a=8x5x4x2/20x2 = 8 hours

Like? Yes (1) | No (2)  

Nishant   8 years AGO

let no. of books being examined be x
x=(No. of examiners)*(No. of days)*(hour of work per day)
x=4*8*5=160
now
for 2 examiners
hour of work per day be H

2x=2*20*H
x=20H
H=160/20
H=8 Ans.

Like? Yes | No (1)  

MRITUNJAY   8 years AGO

Let the no of hours be x.

4*8*5/1=2*x*20/2

Solve x=8 hours
Option 8

Like? Yes | No (2)  

Mukund Manohar   8 years AGO

M1 = 4, M2 = 2
D1 = 8, D2 = 20
H1 = 5, H2 = x
W1 = 1, W2 = 2
(M1*D1*H1)/W1 = (M2*D2*H2)/W2
=> (4*8*5)/1 = (2*20*x)/2
=> x = 320/40
x = 8
Answer is 8 hours

Like? Yes | No (2)