GAT Subject
Engineering
Computer Science Civil Engineering Chemical Engineering Agricultural Engineering Mechanical Engineering Electronics and Communication
32. | Two pipes P and Q can fill a cistern in 12 min. and 15 min. respectively but a third pipe �R� can empty the full tank in 6 min. P and Q are kept open for 5 min. in the beginning and then �R� is also opene In what time is the cistern emptied ? | |
A. | 30 min | |
B. | 35 min | |
C. | 40 min | |
D. | 45 min | |