Two pipes A and B can separately fill a tank in 2 h and 3 h respectively. If both the pipes are opened simultaneously in the empty tank, then the tank will be filled in
A. 1 h 15 min
B. 1 h 20 min
C. 1 h 12 min
D. 2 h 30 min
Answer:C
Two pipes A and B can separately fill a tank in 2 h and 3 h respectively. If both the pipes are opened simultaneously in the empty tank, then the tank will be filled in
A. 1 h 15 min B. 1 h 20 min C. 1 h 12 min D. 2 h 30 min