Three taps A, B and C together can completely fill a tank in 30 minutes. B and C together can fill the same tank in 45 minutes. In how much time (in minutes) A alone can fill the tank?

Three taps A, B and C together can completely fill a tank in 30 minute

1.	Three taps A, B and C together can completely fill a tank in 30 minutes. B and C together can fill the same tank in 45 minutes. In how much time (in minutes) A alone can fill the tank?
A.	120
B.	90
C.	150
D.	80
Answer» C. 150