Three taps A, B and C can fill a tank in 12,15 and 20 hours respectively. If A is open all the time and B and C are open for one hour each alternately, the tank will be full is?
A. 6 hrs
B. hrs
C. 7 hrs
D. hrs
Answer:C
Three taps A, B and C can fill a tank in 12,15 and 20 hours respectively. If A is open all the time and B and C are open for one hour each alternately, the tank will be full is?
A. 6 hrs B. hrs C. 7 hrs D. hrs