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The area of the base of a tank is 100 sq. ft. It takes 20 seconds to

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The area of the base of a tank is 100 sq. ft. It takes 20 seconds to  [#permalink]

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New post 02 Apr 2019, 23:49
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A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

90% (00:59) correct 10% (01:30) wrong based on 21 sessions

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Re: The area of the base of a tank is 100 sq. ft. It takes 20 seconds to  [#permalink]

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New post 03 Apr 2019, 11:22
Area of the tank = LBH
LB = 100
H = ?

Time taken = Area/Speed = 100*H/25 = 20
H = 5

D is the answer.
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Re: The area of the base of a tank is 100 sq. ft. It takes 20 seconds to  [#permalink]

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New post 07 Apr 2019, 18:19
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Bunuel wrote:
The area of the base of a tank is 100 sq. ft. It takes 20 seconds to fill the tank with water poured at rate of 25 cubic feet per second. What is the height in feet of the rectangular tank?

(A) 0.25

(B) 0.5

(C) 1

(D) 5

(E) 25



The volume of the tank is 20 x 25 = 500 cubic feet. Since volume = base area x height, we can let h = height of the tank, so we have:

500 = 100 x h

5 = h

Answer: D
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Re: The area of the base of a tank is 100 sq. ft. It takes 20 seconds to   [#permalink] 07 Apr 2019, 18:19
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