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When 30 gallons of water is poured into a cylindrical tank whose sides

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Joined: 02 Sep 2009
Posts: 51101
When 30 gallons of water is poured into a cylindrical tank whose sides  [#permalink]

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06 Dec 2017, 22:05
00:00

Difficulty:

45% (medium)

Question Stats:

67% (01:57) correct 33% (01:51) wrong based on 26 sessions

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When 30 gallons of water is poured into a cylindrical tank whose sides are perpendicular to a flat base, the water level rises 0.5 foot. If 7.5 gallons of water occupies 1 cubic foot of space, then the base of the tank has an area of how many square feet? (volume of the tank = height x area of base)

(A) 37.5
(B) 8
(C) 4.5
(D) 4
(E) cannot be determined

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Joined: 18 Aug 2016
Posts: 623
Concentration: Strategy, Technology
GMAT 1: 630 Q47 V29
GMAT 2: 740 Q51 V38
Re: When 30 gallons of water is poured into a cylindrical tank whose sides  [#permalink]

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07 Dec 2017, 00:42
Bunuel wrote:
When 30 gallons of water is poured into a cylindrical tank whose sides are perpendicular to a flat base, the water level rises 0.5 foot. If 7.5 gallons of water occupies 1 cubic foot of
space, then the base of the tank has an area of how many square feet? (volume of the tank = height x area of base)

(A) 37.5
(B) 8
(C) 4.5
(D) 4
(E) cannot be determined

0.5 (height) * Area of Base = 30/7.5 Cubic foot
0.5 * Area of Base = 4
Area of Base = 8
B
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Re: When 30 gallons of water is poured into a cylindrical tank whose sides  [#permalink]

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07 Dec 2017, 09:44
Bunuel wrote:
When 30 gallons of water is poured into a cylindrical tank whose sides are perpendicular to a flat base, the water level rises 0.5 foot. If 7.5 gallons of water occupies 1 cubic foot of
space, then the base of the tank has an area of how many square feet? (volume of the tank = height x area of base)

(A) 37.5
(B) 8
(C) 4.5
(D) 4
(E) cannot be determined

The answer is 8. What would be the difficulty level of this question in GMAT?
Re: When 30 gallons of water is poured into a cylindrical tank whose sides &nbs [#permalink] 07 Dec 2017, 09:44
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