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A pool has sprung a leak and is losing water at a rate of 5 milliliter

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Bunuel
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A pool has sprung a leak and is losing water at a rate of 5 milliliter [#permalink] New post   18 Jun 2018, 06:51
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A
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D
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5% (low)

Question Stats:

91% (00:56) correct 9% (01:32) wrong based on 65 sessions
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A pool has sprung a leak and is losing water at a rate of 5 milliliters per second. How many liters of water is this pool losing per hour? (1 liter = 1,000 milliliters)

(A) 3
(B) 6
(C) 12
(D) 18
(E) 24
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D
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Re: A pool has sprung a leak and is losing water at a rate of 5 milliliter [#permalink] New post   18 Jun 2018, 07:10
One important conversion that should be remembered is how many seconds there are in an hour, which is 3600 (60 seconds in a minute, 60 minutes in an hour, 60*60=3600).

So 5ml/s is 5*3600ml/h. That's the same as 5*3.6l/h.

5*3.6=18.

Hence the answer is D.
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Re: A pool has sprung a leak and is losing water at a rate of 5 milliliter [#permalink] New post   18 Jun 2018, 07:31
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Solution



Given:
    • A pool is losing water at a rate of 5 milliliters per second
    • 1 liter = 1000 milliliters

To find:
    • The amount of water, in liters, that the pool will lose in 1 hour

Approach and Working:
In 1 second, the pool is losing 5 milliliters water
    • Therefore, in 1hour, the pool will lose = \(5 * 60 * 60\) milliliters of water = \(\frac{5 * 60 * 60}{1000}\) = 18 liters

Hence, the correct answer is option D.

Answer: D
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Re: A pool has sprung a leak and is losing water at a rate of 5 milliliter [#permalink] New post   20 Jun 2018, 16:56
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Bunuel wrote:
A pool has sprung a leak and is losing water at a rate of 5 milliliters per second. How many liters of water is this pool losing per hour? (1 liter = 1,000 milliliters)

(A) 3
(B) 6
(C) 12
(D) 18
(E) 24


There are 3,600 seconds in one hour. Thus, in one hour the pool loses:

5 x 3600 = 18,000 milliliters, which is 18,000/1,000 = 18 liters.

Answer: D
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Re: A pool has sprung a leak and is losing water at a rate of 5 milliliter [#permalink]
20 Jun 2018, 16:56
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