GAT Subject
Engineering
Computer Science Civil Engineering Chemical Engineering Agricultural Engineering Mechanical Engineering Electronics and Communication
50. | Two pipes P and Q can fill a cistern in 12 and 15 minutes respectively. Both are opened together, but at the end of 3 minutes the first is turned off. How much longer will the cistern take to fill? | |
A. | 9 1/4 min | |
B. | 11 1/4 min | |
C. | 7 1/4 min | |
D. | 8 1/2 min | |