Question

A water tank has two inlets and one outlet. if the inlets fill the tank in 30 and 45 minutes respectively and the outlet empties it in 30 minutes , how much time will take it to fill the tank if all the inlets and outlets are opened together ​

Answer 1

Answer:

sorry I didn't know

Step-by-step explanation:

I'm really sorry

Answer 2

Answer:

Step-by-step explanation:

inlet=20min=1/20 (A let)

outlet=40min=1/40 (B let)

hence, the work done by a&b

=a+b=1/20+(-1/40)=1/40

hence tank will get filled in 40 minutes.