Question

Two inlet pipes can fill a tank in 3 hours and 4 hours
respectively. How long will it take to fill the tank if
both pipes are opened at the same time?​

Answer 1

Answer:

Hey!!

Step-by-step explanation:

Pipe A filling rate is 1/3 or 4/12 per hour

Pipe B filling rate is 1/4 or 3/12 per hour

Combined filling rate is 7/12 per hour.

Answer:It will take 1 hour 28 minutes to fill this tank up with both pipes