Three taps A, B and C can ﬁll a tank in 27, 36 and 54 minutes respectively. If all the three taps are opened, then how much time (in minutes) it will take to completely ﬁll the tank?

Three taps A, B and C can ﬁll a tank in 27, 36 and 54 minutes respec

1.	Three taps A, B and C can ﬁll a tank in 27, 36 and 54 minutes respectively. If all the three taps are opened, then how much time (in minutes) it will take to completely ﬁll the tank?
A.	16
B.	12
C.	10
D.	15
Answer» C. 10