Model 1 Basic Pipes & Cisterns problems Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

Two pipes A and B can separately fill a tank in 2 hours and 3 hours respectively. If both the pipes are opened simultaneously in the empty tank, then the tank will be filled in

a) 1 hour 20 minutes

b) 1 hour 12 minutes

c) 2 hours 30 minutes

d) 1 hour 15 minutes

Question : 2

Pipe A can fill an empty tank in 6 hours and pipe B in 8 hours. If both the pipes are opened and after 2 hours pipe. A is closed, how much time B will take to fill the remaining tank?

a) 3$1/3$ hours

b) 7$1/2$ hours

c) 2$2/5$ hours

d) 2$1/3$ hours

Question : 3

Two pipes A and B can fill a tank in 20 minutes and 30 minutes respectively. If both pipes are opened together, the time taken to fill the tank is :

a) 15 minutes

b) 50 minutes

c) 12 minutes

d) 25 minutes

Question : 4

If two pipes function simultaneously, a tank is filled in 12 hours. One pipe fills the tank 10 hours faster than the other. How many hours does the faster pipe alone take to fill the tank?

a) 12 hrs

b) 20 hrs

c) 18 hrs

d) 15 hrs

Question : 5

Two pipes can fill a cistern in 3 hours and 4 hours respectively and a waste pipe can empty it in 2 hours. If all the three pipes are kept open, then the cistern will be filled in :

a) 12 hours

b) 5 hours

c) 8 hours

d) 10 hours

Question : 6

Two pipes X and Y can fill a cistern in 24 minutes and 32 minutes respectively. If both the pipes are opened together, then after how much time (in minutes) should Y be closed so that the tank is full in 18 minutes ?

a) 5

b) 10

c) 8

d) 6