Question

A tank can be filledby one pump in 50 minutes and by another in 60 minutes. A third pump can drain the tank in 75 minutes. If all pumps work simultaneously, how long will it take to fill the tank in hours

Answer 1

Answer:

42.6 minutes

Step-by-step explanation:

1/50+1/60-1/75

we 1/75 in - because it will drain the tank

by solving this ans 42.6