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During a particular period, water enters a partially filled reservoir

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During a particular period, water enters a partially filled reservoir  [#permalink]

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New post 20 Mar 2016, 10:52
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During a particular period, water enters a partially filled reservoir at a constant rate through a mountain stream. At the same time, water is pumped out of the reservoir at a constant rate through an outlet pipe. At what rate, in gallons per minute, is the amount of water in the reservoir increasing?

(1) The amount of water initially in the reservoir is 1800 gallons.

(2) Water is pumped into the reservoir at a rate of 8 gallons per minute and out of the reservoir at a rate of 20 gallons every 3 minutes.

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Re: During a particular period, water enters a partially filled reservoir  [#permalink]

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New post 20 Mar 2016, 11:35
Bunuel wrote:
During a particular period, water enters a partially filled reservoir at a constant rate through a mountain stream. At the same time, water is pumped out of the reservoir at a constant rate through an outlet pipe. At what rate, in gallons per minute, is the amount of water in the reservoir increasing?

(1) The amount of water initially in the reservoir is 1800 gallons.

(2) Water is pumped into the reservoir at a rate of 8 gallons per minute and out of the reservoir at a rate of 20 gallons every 3 minutes.




On to the data statements. Separately First. Statement (1) is irrelevant; insufficient. Statement (2) gives us the two rates we need, so it is sufficient.

The correct answer is (B). :roll: :roll:
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Re: During a particular period, water enters a partially filled reservoir  [#permalink]

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New post 27 Apr 2016, 14:33
Statement 1 gives the initial capacity of the reservoir, clearly insufficient
statement 2 gives both the rate of inflow as well as outflow which is sufficient to calculate the rate at which water is increasing per minute in the reservoir
Answer - B
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Re: During a particular period, water enters a partially filled reservoir  [#permalink]

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New post 30 Sep 2018, 13:32
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: During a particular period, water enters a partially filled reservoir &nbs [#permalink] 30 Sep 2018, 13:32
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