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1. An empty pool is being filled with water at a constant rate, 3/5 th of the pool has filled in 7 hours. How much more time will it take to completely fill the pool?
- A. 5 hours 20 minutes
- B. 5 hours 20 minutes
- C. 5 hours 20 minutes
- D. 5 hours 20 minutes
Answer: Option B
Explanation:
Remaining part = 1 - 3/5 = 2/5
3/5 part of the pool is filled in 7 hours
So, 2/5 part of the pool is filled in 7 x (2/5) / (3/5) hours
= 7 x 2 / 3 hours = 14 / 3 x 60 minutes = 280 minutes = 4 hours 40 minutes
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