Capgemini
Company
Numerical Ability
Time and Work
1.A,B,C together can do a piece of work in 10 days.All the three started workingat it together and after 4 days,A left.Then,B and C together completed the work in 10 more days.In how many days can complete a work alone??
Options:
15 ,16,50,25 days
2.A train covers a distance between station A and station B in 45 min.If the speed of the train is reduced by 5 km/hr,then the same distance is covered in 48 min.what is the distance between the stations A and B?
Option: 64,55,80,60 km
Read Solution (Total 16)
-
- Ans1 (A+B+C) do 1 work in 10 days.
So (A+B+C)'s 1 day work=1/10 and as they work together for 4 days so workdone by them in 4 days=4/10=2/5
Remaining work=1-2/5=3/5
(B+C) take 10 more days to complete 3/5 work.
So( B+C)'s 1 day work=3/50
Now A'S 1 day work=(A+B+C)'s 1 day work-(B+C)'s 1 day work=1/10-3/50=1/25
A does 1/25 work in in 1 day
Therefore 1 work in 25 days.(Ans) - 9 years agoHelpfull: Yes(35) No(2)
- 2) d=s*t
45mins=3/4 hr and 48mins=4/5 hr
s*(3/4)=(s-5)*(4/5)
3s/4=(4s-20)/5
15s=16s-80
s=80 km. - 9 years agoHelpfull: Yes(27) No(16)
- S*T1=(S-5)8T2
S*45=(S-5)48 SO S=80 PUT DIS IN FST EQN N DIVIDE BY 60
SO THE ANS IS 60.. - 9 years agoHelpfull: Yes(15) No(3)
- 2. 60 k.m will be the ans .make a eqn with previous speed*time takin in hour = (speed-5)*time taking in hour .,.the eqn was posssible as the ditance it is going to n fro is same
- 9 years agoHelpfull: Yes(14) No(6)
- s1/s2=t2/t1;
s1/s1-5=48/45
from this equn s1=80kmph
s=d/t
d=s*t
=80*45/60=60km
- 9 years agoHelpfull: Yes(9) No(1)
- 1) 25 days
- 9 years agoHelpfull: Yes(4) No(1)
- d=s*t
d= s1*(45/60) that is s1*(3/4)
d= s2*(48/60) that is s2*(4/5)
s1*(3/4)=s2*(4/5)
s1*(3/4)=(s1-5)*(4/5) that is speed reduced by 5kmph
s1=80 kmph
d=s.t
d=80*(3/4)= 60 km
- 9 years agoHelpfull: Yes(3) No(0)
- S * (45/60) = (S-5) * (48/60)
on simplifying s=80 kmphr i.e speed
distance = 80*(45/60) or 75*(48/60) = 60km - 9 years agoHelpfull: Yes(2) No(0)
- (1) 25 days
(2) 80km - 8 years agoHelpfull: Yes(1) No(1)
- 2) s=d/t
=> (s1/s2)=(d1/d2)*(t2/t1)
=>( x / (x-5) )=(d / d) * ( 48 / 45 )
=>( 4x-20 ) *4 = 15x
=>x=80 - 7 years agoHelpfull: Yes(1) No(0)
- speed(s)=distance(d)/time(t)...............here distance constant
s*t=constant
s1*t1=s2*t2
speed time
x 45
x-5 48
x*45=(x-5)*48
3x=240
x=80km - 9 years agoHelpfull: Yes(0) No(5)
- 25 DAYS WOULD BE THE ANSWER
- 7 years agoHelpfull: Yes(0) No(0)
- 1. A+B+C's 1 day work 1/10
B+C's 1 day work=3/50
A's 1 day work=1/10-3/50=1/25
A can complete work in 25 days
2.
60x/45=60x/48+5
4x/3=5x/4+5
16x=15x+60
x=60 km - 7 years agoHelpfull: Yes(0) No(0)
- given 1/a+1/b+1/c=1/10
so 1/b+1/c=1/10-1/a
now a work for 4 days and b nd c work for 14 days now
4/a+14/b+14/c=1
4/a+14(1/10-1/a) =1
by solving it we got a=25 days - 7 years agoHelpfull: Yes(0) No(0)
- 1
A+B+C CAN COMPLETE IN 10 DAYS
LET'S TAKE WORK TO BE 10 UNIT THEN THEY TOGHTER COMPLETE 1 UNIT A DAY
IN 4 DAYS THEY COMPLETE 4 UNIT I.E 6 UNIT IS REMAINING . NOW B+C CAN COMPLETE THIS 6 UNIT IN 10 DAYS i.e 6/10 UNIT A DAY
A'S 1 DAY WORK IS 1-6/10=4/10 unit
HENCE A WILL COMPLETE WORK IN = TOTAL WORK/ONE DAY WORK
=10unit/4/10unit/DAY
=10*10/4
=25 DAYS - 7 years agoHelpfull: Yes(0) No(0)
- 2. speed=distance/time
lets assume distance=x;
change the time in hrs=t1=(45/60)=3/4,t2=(48/60)=4/5
speed of train reduced=distance/t1-distance/t2=(how much speed reduced)=5
x/t1-x/t2=5
4x/3-5x/4=5 do LCM
16x-15x=60
x=60 - 4 years agoHelpfull: Yes(0) No(0)
Capgemini Other Question
Find the odd one out: 4 28 48 100
1.Ten yrs ago ashu mother was four times older than her daughter.After 10 yrs,the mother will be twice older than
daughter.the present age of ashu is??
option:30,4,10,5 yrs
2.Five yrs ago,the total of the ages of father and his son was 40 yrs.The ratio of there present ages is??
option:25,30,20,NOT
3.Two yrs ago a man was 6 times as old as a his son.After 18 yrs,he will be twice as old as his son.The present ages are??
4.Javid is as much younger to amir as he is older to tariq,if the sum of the ages of amir and tariq is 48 yrs,what is the age of javid??
option:24,30,20,25 yrs
5.Shah was as old as amir 10 yrs back.How old is amir if shah will be 40 yrs old 10 yrs hence??
option:20,10,30,NOT
6.Samy is twice as old as ruby was 2 yrs old.If the difference of their ages be 2 yrs .How old is samy today??
option:10,12,6,8 yrs.