Mathematics MCQs

Page No. 72

Two pipes P and Q can fill a cistern in 12 minutes and 16 minutes respectively. Simultaneously both the pipes are opened together, then after how much time Q should be closed so that the tank is full in 9 min ?


a2 min


b3 min


c4 min


d5 min


View Answer 4 min

P, Q and R can complete a work in 24, 6 and 12 days respectively. The work will be completed in________days if all of them are working together.


a2


b3 3⁄7


c4 ¼


d5


View Answer 3 3⁄7

A work can be finished in 16 days by twenty women. The same work can be finished in fifteen days by sixteen men. The ratio between the capacity of a man and a woman is_________?


a1:3


b4:3


c2:3


d2:1


View Answer 4:3

If 10 bulls can plough 20 identical fields in 3 days working 10 hours a day, then in how many days can 30 bulls plough 32 same identical fields working 8 hours a day?


a2


b8


c10


d12


View Answer 2

A can lay a railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in_________?


a4


b9.6


c9


d10


View Answer 9.6

Twelve men can do a work in twenty days while twenty women can finish the same work in sixteen days. Find the ratio between the capacity of a man and a woman.


a3:4


b5:4


c4:3


d5:3


View Answer 4:3

A and B can do a piece of work in 12 days; B and C in 15 days; C and A in 20 days. A alone can do the work in__________?


a20 days


b30 days


c40 days


dnone of these


View Answer 30 days

A tap can fill a tank in 32 min. and another can empty it in 16 min. If the tank is already half full and both the tanks are opened together, the tank will be_________?


a12 min


b14 min


c16 min


d20 min


View Answer 16 min

A leak in the bottom of a tank can empty the full tank in 6 hrs. An inlet pipe fills water at the rate of 4 lit. a minute. When the tank is full, the inlet is opened and due to the leak, the tank is empty in 8 hrs. The capacity of the tank in liters is_________?


a5,750 litres


b5,760 litres


c6,890 litres


dNone of these


View Answer 5,760 litres

10 men can complete a work in 7 days. But 10 women need 14 days to complete the same work. How many days will 5 men and 10 women need to complete the work?


a30 days


b25 days


c20 days


d15 days


View Answer 25 days

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