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Question
An empty pool is being filled with water at a constant rate, 3/5th of the pool has filled in 7 hours. How much more time will it take to completely fill the pool?
5 hours 20 minutes
4 hours 40 minutes
4 hours 20 minutes
2 hours 48 minutes
5 hours 40 minutes
ANSWER : 2
Descrption
<p>Remaining part = 1 - 3/5 = 2/5</p> <p>3/5 part of the pool is filled in 7 hours</p> <p>So, 2/5 part of the pool is filled in 7 x (2/5) / (3/5) hours</p> <p> = 7 x 2 / 3 hours = 14 / 3 x 60 minutes = 280 minutes = <strong> 4 hours 40 minutes</strong></p>
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