Question

Pipe A can fill a tank in 45 hours and pipe B can empty it in 36 hours. If both of them are opened in the empty tank, in how many hours will it be full?​

Answer 1

Answer:

HERE IS YOUR ANSWER

PIPE A can fill a tank in =45hrs

pipe B can empty a tank in=36hrs

Work done in 1hr=1/45 of the work

work done in 1hr=1/36 of the work

1/45+1/36=9/180

We reciprocal the number 9/180

180/9=20 hours

IN 20 hours the tank is fill,..

HOPE THIS HELP'S YOU...