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.Management Sciences
A. 6 hours
B. 6 2/3 hours
C. 7 hours
D. 7 1/2 hours
Related Mcqs:
- Two pipes A and B can fill a cistern in 20 and 30 minutes respectively, and a third pipe C can empty it in 40 minutes. How long will it take to fill the cistern if all the three are opened at the same time?
- A. 19 1/7 min B. 15 1/7 min C. 17 1/7 min D. 7 1/7 min...
- pipes P and Q would fill a cistern 18 and 24 minutes respectively. Both pipes being opened, find when the first pipe must be turned off so that the cistern may be just filled in 12 minutes?
- A. after 12 mins B. after 9 mins C. after 8 1/2 mins D. after 10 mins...
- Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in?
- A. 1 13/17 hours B. 2 8/11 hours C. 3 9/17 hours D. 4 1/2 hours...
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