Examples of time and work 10

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17) A is 30% more efficient than B. How much time will they, working together, take to complete
a job which A alone could have done in 23 days?
a) 11 days b) 13 days c) 20
d) Data inadequate e) None of these
18) Ravi and Kumar are working on an assignment. Ravi takes 6 hours to type 32 pages on a
computer, while Kumar takes 5 hours to type 40 pages. How much time will they take,
working together on two different computers to type an assignment of 110 pages?
a) 7 hours 30 minutes b) 8 hours c) 8 hours 15 minutes
d) 8 hours 25 minutes e) None of these
19) A, B and C can complete a piece of work in 24, 6 and 12 days respectively. Working together,
they will complete the same work in:
a) day b) day c) 3 ]
d) 4 days e) None of these
20) Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The
number of days taken by Tanya to do the same piece of work is:
a) 15 b) 16 c) 18
d) 25 e) None of these
21) A takes twice as much time as B or thrice as much time as C to finish a piece of work.
Working together, they can finish the work in 2 days. B can do the work alone in:
a) 4 days b) 6 days c) 8 days
d) 12 days e) None of these
22) A and B can complete a work in 15 days and 10 days respectively. They started doing the
work together but after 2 days B had to lea0ve and A alone completed the remaining work.
The whole work was completed in:
a) 8 days b) 10 days c) 12 days
d) 15 days e) None of these
23) A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days
and C and A in 20 days. They all work together for 10 days when B and C leave. How many
days more will A take to finish the work?
a) 18 days b) 24 days c) 30 days
d) 36 days e) None of these
24) A works twice as fast as B. If B can complete a work in 12 days independently, the number of
days in which A and B can together finish the work in:
a) 4 days b) 6 days c) 8 days
d) 18 days e) None of these
25) Twenty women can do a work in sixteen days. Sixteen men can complete the same work in
fifteen days. What is the ration between the capacity of a man and a woman?
a) 3 : 4 b) 4 : 3 c) 5 : 3
d) Date inadequate e) None of these


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