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# Logic for Cylinders Question

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Joined: 31 Jul 2016
Posts: 7
Location: India

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19 Apr 2017, 10:51
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A closed cylindrical tank contains 36PI cubic feet of water and is filled to half its capacity. When the tank is placed upright on its circular base on level ground, the height of the water in the tank is 2 feet. When the tank is placed on its side on level ground, what is the height, in feet, of the surface of the water above the ground?

And the solution takes h = 4, why?
V = PI*r^2*h
36 PI = PI*r^2*h
36= r^2*(4)
9 = r^2
3=r

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Avinash Verma

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Joined: 02 Sep 2009
Posts: 49251
Re: Logic for Cylinders Question  [#permalink]

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20 Apr 2017, 07:56
avinashvpec wrote:
A closed cylindrical tank contains 36PI cubic feet of water and is filled to half its capacity. When the tank is placed upright on its circular base on level ground, the height of the water in the tank is2 feet. When the tank is placed on its side on level ground, what is the height, in feet, of the surface of the water above the ground?

And the solution takes h = 4, why?
V = PI*r^2*h
36 PI = PI*r^2*h
36= r^2*(4)
9 = r^2
3=r

Discussed here: a-closed-cylindrical-tank-contains-36pi-cubic-feet-of-water-134500.html In case of any further question please post in that post.

Notice that some editions of OG have a typo saying that the height of the water in the tank is 2 feet, it should read "the height of the water in the tank is 4 feet".

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

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Re: Logic for Cylinders Question &nbs [#permalink] 20 Apr 2017, 07:56
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