Two taps A and B can fill a tank in 10 hours and 15 hours respectively. If both the taps are opened together, the tank will be full in:
A. 5 hrs
B. 12 and 1/2 hrs
C. 6 hrs
D. 7 and 1/2 hrs
Answer:C
Two taps A and B can fill a tank in 10 hours and 15 hours respectively. If both the taps are opened together, the tank will be full in:
A. 5 hrs B. 12 and 1/2 hrs C. 6 hrs D. 7 and 1/2 hrs
Explanation: A's hours work=1/10, B's 1 hours work = 1/15,