Entry Test MCQ :: Time and Work Problems

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11.

X can do a job in 16 days Y can do the same job in 20 days X Y and Z can do the job in 7.5 days. Alone Z can do the same job in

A.	100 days	B.	120 days
C.	80 days	D.	48 days

12.

Ahmar works twice as fast as Bina. If Bina can complete a work in 30 days the number of days taken by Ahmar and Bina to complete the work working together is

A.	16 days	B.	24 days
C.	20 days	D.	10 days

13.

A certain number of men could complete work in 40 days. If there were 20 men more the work could be completed in 20 days. The original number of men is

A.	85	B.	30
C.	40	D.	20

14.

A and B can do a piece of work in 10 days. B and C in 15 days C and A in 30 days. In how many days can they do it all working together?

A.	8 days	B.	6 days
C.	11 days	D.	10 days

15.

A is thrice as good workman as B and together they finish a piece of work in 24 days. In how many days can A alone finish the work

A.	20 days	B.	25 days
C.	32 days	D.	29 days

16.

A works thrice as fast as B. If B can complete a work in 18 days. Then number of days taken by A and B working together to complete this work is

A.	8 days	B.	9 days
C.	5 days	D.	4.5 days

17.

A can finish a work in 24 days B can finish the same work in 36 days. If they work together and finish it then out of total wages of Rs. 500 A will get

A.	Rs. 220	B.	Rs. 200
C.	Rs. 300	D.	Rs. 360

18.

16 men can finish two fifth of the work in 4 days. The number of additional men required to finish the remaining work in 2 more days will be

A.	24 men	B.	0 men
C.	30 men	D.	39 men

19.

Pipe A can fill a tank in 10 hours and pipe B can empty it in 15 hours. In how many hours will the tank be filled if both the pipes are opened?

A.	6	B.	10
C.	20	D.	30

20.

A tank which has a leak in the bottom is filled in 20 hours. Had there been no leak the tank would have been filled in 15 hours. The leak can empty the full tank in

A.	80 hrs	B.	5 hrs
C.	60 hrs	D.	2 hrs