Two pipes A and B can fill a tank in 20 minutes and 30 minutes respectively. If both pipes are opened together, the time taken to fill the tank is:
Two pipes A and B can fill a tank in 20 minutes and 30 minutes respectively. If both pipes are opened together, the time taken to fill the tank is:
[A]15 minutes
[B]25 minutes
[C]50 minutes
[D]12 minutes
12 minutes
Part of the tank filled by both pipes in one minute =
Required time =
∴ Required time = 12 Minutes
Hence option [D] is the right answer.
