Question

1 A water tank has an inlet and an outlet is capable of emptying the tank in 40 minutes. when the inlet was opened to fill the empty tank, the person did not notice that
The outlet was open. so both the inlet ant the outlet were open. In how much time will the tank be just filled? ​

Answer 1

Answer:

mark as brainlist plz find attachment

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.