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Problems on Time and work


Posted Date: 29-Feb-2008  Last Updated:   Category: Placement Papers    
Author: Member Level: Gold    Points: 5



TIME AND WORK

1.If 20 men take 30 days to complete a job.In how many days can 25 men complete the job?
a)28 days b)24 days c)36 days d)20 days
2.Fifteen men take 10 days to complete a job working 12 hours a day.How many hours a day
should 10 men work to complete the job in 20 days?
a)20 days b)8 days c)9 days d)10 days
3.A piece of work can be done by 16 men in 8 days working 12 hours a day.How many men are
needed to complete another work, which is three times the first one,in 24 days working 8
hours a day?
a)24 men b)29 men c)20 men d)30 men
4.A can do a piece of work in 9 days.,B can do the same in 12 days.In how many days can the
work be completed if A and B work together?
a)5 1/9 days b)5 1/4 days c)5 1/3 days d)5 1/7 days
5.A and B together can do a piece of work in 12 days and A alone can complete the work in 18
days. How long will B alone take to complete the job?
a)30 days b)36 days c)6 days d)56 days
6.Anil and Amit can complete a job in 12 days working together. Amit alone can complete it in
16 days.Both of them worked together for 4 days and then Amit left. How long will Anil take
to complete the remaining work?
a)30 days b)47 days c)32 days d)24 days
7.A and B can do a piece of work in 12 days,B and C can do it in 15 days and C and A can do
the same work in 20 days. How long would each take to complete the job?
a)1/30,1/20,1/60 b)1/20,1/30,1/30 c)1/20,1/20,1/20 d)1/60,1/0,1/30
8.A and B can do a work in 12 days,B and C in 15 days and C and A in 20 days.They all work
together for 6 days and then A left.In how many more days can B and C finish the remaining
work?
a)5 days b)6 days c)8 days d)9 days
9.A can do a work in 12 days.When he had worked for 3 days B joined him.If they complete the
work in 3 more days.In how many days can B alone can finish the work?
a)5 days b)6 days c)8 days d)9 days
10.A and B together can do a piece of work in 14 2/5 days;B and C together can do the same
work in 12 days.After A worked for 8 days,B for 12 days C takes up and finished it alone
in 6 days.In how many days will each of them do the work,working alone?
a)28 days b)24 days c)36 days d)20 days
11.To do a certain work C alone takes twice as long as A and B together.A would take 3 times
as long as B and C together.All three together complete the work in 5 days.How long would
each take separately?
a)15 days b)29 days c)20 days d)10 days
12.4 men or 5 women can construct a wall in 82 days.How long will it take 5 men and 4 women to
do the same?
a)30 days b)47 days c)32 days d)40days
13.If 9 men and 12 boys can do a piece of work in 4 days and 4 men and 16 boys can do the same
piece of work in 6 days.how long will 6 men and 24 boys take to complete the same work?
a)5 days b)6 days c)8 days d)4 days
14.A certain number of men can do a work in 20 days.If there were 4 more men,the work can be
done in 5 days less.How many men were there initially?
a)12 days b)18 days c)16 days d)4 days
15.X is 3 times as fast as Y and is able to complete the work in 40 days less than Y.Find the
time in which they can complete the work together?
a)12 days b)17 days c)19 days d)15 days
16.Sita can finish some work in 12 days working 4 hours a day.Gita can finish the same in 15
days working 3 hours a day.In how many days can they finish it working together at 4 1/2
hours a day?
a)5 5/31 days b)5 5/32 days c)5 5/33 days d)5 5/34 days
17.A alone can do a work in 12 days and B alone in 18 days.If C takes twice as long as A and B
together,how long will B and C together take to complete the same work?
a)5 days b)6 days c)8 days d)4 days
18.A and B each working alone can do a work in 10 and 15 days respectively.They started the work
together but B left after sometime and A finished the remaining work in 5 days.After how many
days from the start did B leave?
a)4 days b)3 days c)2 days d)8 days
19.A contractor decided to complete the work in 40 days and employed 60 men at the beginning and
40 men additionally after 10 days and got the work completed as per schedule.If he had not
employed the additional men,how many extra days would he have needed to complete the work?
a)30 days b)20 days c)40 days d)45 days
20.A group of 35 men is employed to complete some work in 48 days.After 33 days,5 more men are
employed and the work is finished 1 day ealier.If 5 more men were not employed,how many more
days would it have taken beyond the expected period?
a)7 day behind schedule
b)3 day behind schedule
c)2 day behind schedule
d)1 day behind schedule
21.A and B working separately can do a piece of work in 6 and 9 days respectively;they work on
althernate days starting with A on the first day.In how many days will the work be done?
a)4 days b)3 days c)2 days d)7 days
22.A and B working separately can do a piece of work in 6 and 12 days respectively.They work on
alternate days starting with A on the first day.In how many days will the work be completed?
a)4 days b)3 days c)2 days d)8 days
23.A and B working separately,can do a piece of work in 12 and 15 days .They work on alternate
days starting with A on the first day.In how many days will the work be completed?
a13 1/4 days b)13 2/4 days c)13 3/4 days d)135/4 days
24.A and B working separately can do a piece of work in 20 and 24 days.They work on alternate
days starting with B on the first day.In how many days will the work be completed?
a)21 5/6 days b)21 1/6 days c)21 4/5 days d)none of these
25.A ,B and C can do a piece of work in 4,5 and 7 days respectively.They got Rs.415 for the job.
what is A's share?
a)120 b)175 c)160 d)140
26.A,B and C contract a work for Rs.4500.A and B together complete 3/5th of the work and then C
takes over and finished the work.What is the amount got by C?
a)1200 b)1800 c)1600 d)1400
27.Wages for 40 women for 30 days are Rs,21,600.How many men must work for 25 days to earn Rs.
14,400 if the daily wages for a man are double that of a women?
a)12 b)14 c)16 d)19
28.A,B and C can together earn Rs.1,620 in 9 days.A and C can earn Rs.600 in 5 days where as B and
C in 7 days can earn Rs 910.Find the daily earnings of C?
a)Rs 60 b)Rs 70 c)Rs 80 d)Rs 90
29.A can do a piece of work in 20 days and B in 30 days.A starts the work and worked for 6 days.
Then B completed the remaining part of the work.In how many days was the work completed?
a)24 b)27 c)32 d)34
30.A can do a piece of work in 24 days and B in 48 days.B joins A after A had worked alone for
6 days.In how many more days would the work get completed?
a)10 b)11 c)12 d)13
31.P can complete a piece of work in 20 days and Q in 30 days.P worked alone for 4 days and then
Q completed the remaining work along with R in 18 days.In how many days can R working alone
complete the work?
a)60 b)65 c)80 d)90
32.25 men take 25 days to construct a wall 10 m high.How many men would be required to construct a
similar wall,which is 8 m high,if it is planned that the work would be completed in 10 days?
a)32 b)40 c)44 d)48
33.20 cows and 40 goats can be kept for 10 days for Rs.460.What would be the cost of keeping 50
cows and 30 goats for 12 days if the cost of keeping 5 goats is the same as cost of keeping
1 cow?
a)Rs 888 b)Rs 965 c)Rs 1007 d)Rs 1104
34.A,B and C started the work and after completing 1/5th of the work C left.A and B then worked
for 20 days.C then took over from A and B and completed the remaining portion of the work in
12 days.If C takes 40 days to complete the work , in how many days wourd A alone or B alone
complete the work if the efficiencies with which they work is the same?
a)40 b)60 c)80 d)100
35.A boy is trying to cover a distance of 100 meters.He takes a jump forward and covers 2m,but
every time he jumps forward he also moves 1m backward.In all,how many jumps would be required
to cover the distance?
a)99 b)100 c)98 d)none of these
36.A piece of work can be completed by 10 men in certain number of days.If there were 2 men less
it would have taken 3 more days to complete the work.In how many days can 24 men complete the
same work?
a)2 b)3 c)4 d)5
37.A is 80 % more efficient than B who is 60% more efficient than C.A takes 40 days less than B to
complete a work. A starts the work and works for 25 days and then B takes over.B then work for
the next 30 days and then stops.In how much more time can C complete the remaining work?
a)20 days b)24 days c)32 days d)40 days
38.3 men and 5 women can complete a work in 12 days ,which 5 men and 12 women can complete in 6
days.In how many days can 4 men and 4 women complete the same work?
a)7 b)10 c)11 d)12
39.P and Q agreed to complete a job in 15 days for Rs 6200.P can complete the same job in 50 days
and Q in 30 days.They had to take R to complete the work in time.Find R's share in the money
earned by them.
a)Rs 880 b)Rs 1240 c)Rs 1460 d)Rs 2020
40.A and B complete a piece of work in 10 days.B and C in 12 days and C and A in 15 days.All the
three of them started working and then B left after 4 days.C left 3 days after that and then
immediately B joined A again to complete the remaining work.In how many days was the work
completed?
a)10 b)12 c)14 d)22


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