GAT Subject
Engineering
Computer Science Civil Engineering Chemical Engineering Agricultural Engineering Mechanical Engineering Electronics and Communication
12. | 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. | 6 2/3 hrs | |
C. | 7 hrs | |
D. | 7 1/2 hrs | |