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 in _____ ?
A. 7 hours
B. 7 1/2 hours
C. 6 hours
D. 6 2/3 hours
Pipes and Cisterns
Pipes and Cisterns aptitude questions and answers for competitive exams. Pipes and Cisterns MCQs for test preparation and entry tests.