Question

A tank can/be filled with water by two pipes a and b together/in 36 minutes.If the pipe b was stopped after 30 minutes the tank is filled in 49inutes.The pipe alone filled

Answer 1

Answer:

Explanation:

Let the time taken be x minutes.

Part of tank filled by pipes A and B in one minute: 1/36;

Part of the tank filled by pipe A in 1 minute = 1/36 -1/x;

A.T.Q.,

30*1/x+(1/36 -1/x) = 1

30/x +10/9 -40/x = 1

10/x = 1/9

x=10*9

x = 90 minutes.