What is the time taken by two pipes M and N together to fill a tank completely given that pipes M and N can fill the tank in 42 and 56 minutes respectively?
1
24 minutes
2
26 minutes
3
28 minutes
4
42 minutes
What is the time taken by two pipes M and N together to fill a tank completely given that pipes M and N can fill the tank in 42 and 56 minutes respectively?