Question

a tank is filled by 2 inlet pipes .pipe A can fill the tank in 8 hrs and pipe B can fill it in 6 hrs how long will it take to fill the tank if both the pipes are opened at a time (with steps)

Answer 1

Pipe A fills 8hrs
pipe B 6hrs

1/A+B =1/A +1/B
1/A+B= 1/8 +1/6
1/A+B= 7/24
A+B can fill it in 24/7 hrs