Questions :
Pipes A and B can fill a tank in one hour and two hours respectively while pipe C can empty the filled up tank in one hour and fifteen minutes. A and C are turned on together at 9 a.m. After 2 hours. Only A is closed and B is turned on. When will the tank be emptied ?
Options :
- 12 : 10 p.m
- 11 : 30 a.m
- 10 : 30 a.m
- 12 : 20 p.m
correct answer : d)
