Two pipes A and B can fill a tank in 12 hours and 15 hours respectively. If they are opened on alternate hours with pipe B opened first, then in how many hours the tank will be ful?

Two pipes A and B can fill a tank in 12 hours and 15 hours respectively. If they are opened on alternate hours with pipe B opened first, then in how many hours the tank will be full?

A) 13 1/4hrs
B) 14 2/4hrs
C) 14hrs
D) 13 2/5hrs

Answer & Solution

Answer: Option A
Solution:
13 1/4hrs