Question

A tank can be filled by one tap in 4 hrs and another tap in 6 hrs. How long will it take to fill the tank if both taps are opened together?
Solve and write the final answer

Answer 1

10 hours because if we add the 6 hrs &4 hrs =10hrs

Answer 2

part filled by A tank in 1hr=1/4
part filled by B tank in 1hr=1/6
part filled by(A+B)in 1hr=1/4+1/6
=5/12
So all pipes will fill the tank in 12/5 hours.