There is a water tank which is 2/5th full. Pipe A can fill that tank in 4 hrs and pipe B can empty that tank in 6 hrs. If both pipes are open together, then find the time taken (in hrs.) to fill that tank completely?
1
8
2
7.8
3
7.4
4
7.2
5
6
There is a water tank which is 2/5th full. Pipe A can fill that tank in 4 hrs and pipe B can empty that tank in 6 hrs. If both pipes are open together, then find the time taken (in hrs.) to fill that tank completely?