### Pipes and Cistern mcq

Pipe A can fill a tank in 4 hours , while Pipe B can fill the same tank in 6 hours . How long will it take to fill the tank if both pipes are opened together?

a) 2 hours

b) 3 hours

c) 4 hours

d) 5 hours

Answer: b) 3 hours

Pipe A can fill a tank in 8 hours , while Pipe B can empty the same tank in 12 hours. If both pipes are opened together, how long will it take to empty the tank?

a) 3 hours

b) 4 hours

c) 6 hours

d) 24 hours

Answer: c) 6 hours

Pipe A can fill a tank in 5 hours . After working for 2 hours , it springs a leak that slows down the filling process by half . How long will it take to fill the tank completely ?

a) 4 hours

b) 5 hours

c) 6 hours

d) 7 hours

Answer: c) 6 hours

Pipe A can fill a tank in 3 hours, while Pipe B can fill the same tank in 5 hours. Pipe C can empty the tank in 8 hours. If all three pipes are opened together, how long will it take to fill the tank?

a) 2 hours

b) 3 hours

c) 4 hours

d) 5 hours

Answer: d) 5 hours

Pipe A can fill a tank in 6 hours , while Pipe B can fill the same tank in 10 hours. Pipe C can empty the tank, in 15 hours. If all three pipes are opened together how long will it take to fill the tank?

a) 4 hours

b) 6 hours

c) 10 hours

d) It cannot be determined

Answer: d) It cannot be determined

Pipe A can fill a tank in 2 hours while Pipe B can fill the same tank, in 4 hours. If Pipe C can fill the tank in 3 hours how long will it take to fill the tank if all three pipes are opened together?

a) 1 hour

b) 2 hours

c) 3 hours

d) 4 hours

Answer: b) 2 hours

Pipe A can fill a tank in 5 hours, while Pipe B can empty the same tank in 10 hours. If both pipes are opened together. how long will it take to fill the tank ?

a) 2 hours

b) 5 hours

c) 10 hours

d) It cannot be determined

Answer: d) It cannot be determined

Pipe A can fill a tank in 4 hours , while Pipe B can fill the same tank in 6 hours. Pipe C can empty the tank in 8 hours. If Pipe C is opened for the first hour, followed by Pipe A and Pipe B , how long will it take to fill the tank?

a) 1 hour

b) 2 hours

c) 3 hours

d) 4 hours

Answer: d) 4 hours

Pipe A can fill a tank in 10 hours. After working for 2 hours, it is closed and Pipe B is opened. If Pipe B can fill the remaining tank in 4 hours, how long will it take to fill the tank completely?

a) 4 hours

b) 6 hours

c) 8 hours

d) 10 hours

Answer: c) 8 hours

Pipe A can fill a tank in 3 hours, while Pipe B can fill the same tank in 5 hours. Pipe C can empty the tank in 6 hours. If Pipe A and Pipe B are opened together for the first hour, followed by Pipe C, how long will it take to fill the tank completely?

a) 2 hours

b) 3 hours

c) 4 hours

d) 5 hours

Answer: d) 5 hours

Pipe A can fill a tank in 8 hours, while Pipe B can empty the same tank in 12 hours. If Pipe C can fill the tank in 6 hours how long will it take to fill the tank, if all three pipes are opened together ?

a) 2 hours

b) 4 hours

c) 6 hours

d) It cannot be determined

Answer: d) It cannot be determined

Pipe A can fill a tank in 6 hours, while Pipe B can empty the same tank, in 10 hours . If Pipe C can fill the tank in 5 hours how long will it take to fill the tank completely ?

a) 4 hours

b) 5 hours

c) 6 hours

d) It cannot be determined

Answer: d) It cannot be determined

Pipe A can fill a tank in 4 hours, while Pip e B can empty the same tank in 8 hours. If both pipes are opened together for the first hour, followed by Pipe B, how long ,will it take to fill the tank completely ?

a) 2 hours

b) 4 hours

c) 6 hours

d) 8 hours

Answer: c) 6 hours

Whereas Pipe B can fill the same tank in 9 hours, Pipe A can do so in 7 hours. In 14 hours, Pipe C can empty the tank. How long will it take to fill the tank if Pipes A, B, and C are opened simultaneously?

a) 7 hours

b) 14 hours

c) 21 hours

d) It cannot be determined

Answer: d) It cannot be determined

A tank can be filled by Pipe A in 12 hours and by Pipe B in 18 hours. How long will it take for the tank to be fully filled if Pipe C can empty it in 9 hours?

a) 9 hours

b) 12 hours

c) 18 hours

d) It cannot be determined

Answer: d) It cannot be determined

A tank can be filled by Pipe A in 5 hours, and it can be emptied by Pipe B in 10 hours. How long will it take to fill the tank if Pipe A, Pipe B, and Pipe C are opened simultaneously for the first hour, followed by Pipe C, if Pipe C can fill the tank in 6 hours?

a) 2 hours

b) 4 hours

c) 6 hours

d) It cannot be determined

Answer: d) It cannot be determined

Pipe A can fill a tank in 6 hours, while Pipe B can empty the same tank in 9 hours. If both pipes are opened together for the first hour, followed by Pipe A, how long will it take to fill the tank completely?

a) 2 hours

b) 4 hours

c) 6 hours

d) It cannot be determined

Answer: d) It cannot be determined

A tank can be filled by Pipe A in 6 hours, and it can be emptied by Pipe B in 9 hours. How long will it take for the tank to fill entirely if both pipes are opened simultaneously for the first hour, then Pipe A.

a) 1 hour

b) 2 hours

c) 3 hours

d) 4 hours

Answer: b) 2 hours

In 6 hours, Pipe A can fill a tank, and in 9 hours, Pipe B can empty it. How long will it take for the tank to completely fill if Pipe A is opened first and then both pipes are opened concurrently for the first hour?

a) 7 hours

b) 9 hours

c) 14 hours

d) It cannot be determined

Answer: d) It cannot be determined

Whereas Pipe B can empty the same tank in 15 hours, Pipe A can replenish it in 10 hours. How long will it take to fill the tank if all three pipes are opened at once if Pipe C can fill it in 12 hours?

a) 4 hours

b) 5 hours

c) 6 hours

d) It cannot be determined

Answer: d) It cannot be determined

A tank can be filled by Pipe A in 6 hours, and it can be emptied by Pipe B in 12 hours. How long will it take to completely fill the tank if Pipe C can fill it in 8 hours?

a) 4 hours

b) 6 hours

c) 8 hours

d) It cannot be determined

Answer: d) It cannot be determined

Pipe A can fill a tank in 4 hours, and Pipe B can empty it in 8 hours. If Pipes A and B are opened simultaneously for the first hour, followed by Pipe C, how long will it take for the tank to be entirely empty?

a) 2 hours

b) 4 hours

c) 6 hours

d) 8 hours

Answer: b) 4 hours

In 3 hours, Pipe A can fill a tank, and Pipe B can empty it in 5 hours. If both lines are opened at once, how long will it take to empty the tank?

a) 2 hours

b) 3 hours

c) 5 hours

d) It cannot be determined

Answer: d) It cannot be determined

Whereas Pipe B can empty the same tank in 12 hours, Pipe A can fill it in 8 hours. How long will it take to completely fill the tank if Pipe C can fill it in 6 hours?

a) 2 hours

b) 4 hours

c) 6 hours

d) It cannot be determined

Answer: d) It cannot be determined

A tank can be filled by Pipe A in 6 hours, and it can be emptied by Pipe B in 9 hours. How long will it take to fill the tank if all three pipes are opened at once if Pipe C can fill it in 7 hours?

a) 3 hours

b) 6 hours

c) 7 hours

d) It cannot be determined

Answer: d) It cannot be determined

A tank can be filled by Pipe A in 5 hours, and it can be emptied by Pipe B in 10 hours. How long will it take to fill the tank if Pipe A and Pipe C are opened simultaneously for the first hour, then Pipe B, if Pipe C can fill the tank in 15 hours?

a) 5 hours

b) 10 hours

c) 15 hours

d) It cannot be determined

Answer: d) It cannot be determined

Whereas Pipe B can empty the same tank in 12 hours, Pipe A can fill it in 8 hours. How long will it take to fill the tank if all three pipes are opened at once if Pipe C can fill it in 10 hours?

a) 6 hours

b) 8 hours

c) 10 hours

d) It cannot be determined

Answer: d) It cannot be determined

In 5 hours, Pipe A can fill a tank, and in 10 hours, Pipe B can empty it. If Pipe C can fill the tank in 20 hours, how long will it take to fill it completely?

a) 10 hours

b) 15 hours

c) 20 hours

d) It cannot be determined

Answer: d) It cannot be determined

In 6 hours, Pipe A can fill a tank, and Pipe B can empty it in 12 hours. If all three pipes are opened simultaneously, how long will it take to empty the tank if Pipe C can do so in eight hours?

a) 2 hours

b) 4 hours

c) 6 hours

d) It cannot be determined

Answer: d) It cannot be determined

In 4 hours, Pipe A can fill a tank, and in 6 hours, Pipe B can empty it. If Pipes A and B are opened simultaneously for the first hour, followed by Pipe C if Pipe C can fill the tank in five hours, how long will it take to fill the tank?

a) 3 hours

b) 4 hours

c) 5 hours

d) It cannot be determined

Answer: d) It cannot be determined