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1. 3 pumsps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the same tank in 1 day?
- A. 9 hours
- B. 9 hours
- C. 9 hours
- D. 9 hours
Answer: Option D
Explanation:
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1. 3 pumsps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the same tank in 1 day?
Answer: Option D
Explanation:
Post your comments here: