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A water pump began filling an empty swimming pool with water and ran a
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15 Nov 2023, 01:11
15 Nov 2023, 01:11
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A water pump began filling an empty swimming pool with water and ran at a constant rate tillì the swimming pool was full. At sometime, the pool was \(\frac{1}{2}\) full, and \(2 \frac{1}{3}\) hours later, it was \(\frac{5}{6}\) full. How many hours would it take the pump to fill the empty pool completely?
A. 4
B. \(5 \frac{1}{3}\)
C. 7
D. \(7 \frac{1}{5 }
\)
E. \(8 \frac{1}{3}\)
A. 4
B. \(5 \frac{1}{3}\)
C. 7
D. \(7 \frac{1}{5 }
\)
E. \(8 \frac{1}{3}\)
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Free Materials for the GRE General Exam - Where to get it!!
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Re: A water pump began filling an empty swimming pool with water and ran a
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15 Nov 2023, 14:33
15 Nov 2023, 14:33
The answer is (C).
2 1/3 hours can be re-written as 7/3 hours.
Water filled in 7/3 hours = (5/6) - (1/2) = 1/3
--> Water filled per hour = (1/3)/(7/3) = 1/7
w = r * t
--> t = w/r = 1/(1/7) = 7 hours
2 1/3 hours can be re-written as 7/3 hours.
Water filled in 7/3 hours = (5/6) - (1/2) = 1/3
--> Water filled per hour = (1/3)/(7/3) = 1/7
w = r * t
--> t = w/r = 1/(1/7) = 7 hours
gmatclubot
Re: A water pump began filling an empty swimming pool with water and ran a [#permalink]
15 Nov 2023, 14:33
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