Question
88 of
100
Question Palette
Two pipes A and B can fill a tank in 20 minutes and 30 minutes, respectively. If both pipes are used together, how long will it take to fill the tank?
Correct Option:
B
Explanation
Combined rate = 1/20 + 1/30 = (3 + 2)/60 = 1/12. Thus, together the pipes fill exactly one tank in 12 minutes.
