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As shown in the figure above, a cylindrical oil tank is i full. If 3

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As shown in the figure above, a cylindrical oil tank is i full. If 3 [#permalink]

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New post 08 Feb 2018, 05:38
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As shown in the figure above, a cylindrical oil tank is i full. If 3 more gallons are added, the tank will be half full. What is the capacity, in gallons, of the tank?

(A) 15
(B) 16
(C) 17
(D) 18
(E) 19

[Reveal] Spoiler:
Attachment:
2018-02-08_1636.png
2018-02-08_1636.png [ 7.29 KiB | Viewed 402 times ]
[Reveal] Spoiler: OA

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Re: As shown in the figure above, a cylindrical oil tank is i full. If 3 [#permalink]

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New post 08 Feb 2018, 05:44
1/3x+3=1/2x
X+9/3=1/2x
2x+18=3x
X=18

Ans D

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Re: As shown in the figure above, a cylindrical oil tank is i full. If 3 [#permalink]

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New post 08 Feb 2018, 07:03
3 gallons is equal to 1/2 - 1/3 = 1/6 of the total capacity of the tank

Therefore capacity of the tank is 3 / (1/6) = 18 gallons

=> Answer D
Re: As shown in the figure above, a cylindrical oil tank is i full. If 3   [#permalink] 08 Feb 2018, 07:03
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As shown in the figure above, a cylindrical oil tank is i full. If 3

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