Question

an inlet pipe can fill a cistern in 32 hours whereas an outlet pipe can drain it in 40 hours. both the pipes are opened when the cistern was empty. but outlet pipe was closed when the cistern was three quarters full. how much time does it take to fill the cistern​

Answer 1

Answer:

an inlet pipe can fill a cistern in 32 hours whereas an outlet pipe can drain it in 40 hours. both the pipes are opened when the cistern was empty. but outlet pipe was closed when the cistern was three quarters full. how much time does it take to fill the cistern