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# When 200 gallons of oil were removed from a tank

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When 200 gallons of oil were removed from a tank [#permalink]  25 Mar 2009, 22:05
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When 200 gallons of oil were removed from a tank, the volume of oil left in the tank was $$\frac{3}{7}$$ of the tank's capacity. What was the tank’s capacity?

(1) Before the 200 gallons were removed, the volume of oil in the tank was $$\frac{1}{2}$$ of the tank's capacity.
(2) After the 200 gallons were removed, the volume of the oil left in the tank was 1,600 gallons less than the tank's capacity.

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Manager
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Re: Quantity [#permalink]  26 Mar 2009, 01:55
D
(1) 1/2*x-3/7*x=200 , can solve for x
(2) x-1600=3/7*x
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Re: Quantity [#permalink]  26 Mar 2009, 02:31
1
This post was
BOOKMARKED
A : 1/2*x-3/7*x=200 SUFFICIENT
B : x-1600=3/7*x SUFFICIENT
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Re: Quantity [#permalink]  14 Oct 2009, 07:36
liubhs02 wrote:
D
(1) 1/2*x-3/7*x=200 , can solve for x
(2) x-1600=3/7*x

Same approach, agree!
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Re: Quantity [#permalink]  19 Oct 2011, 03:27
:D:

Let current quantity in tank = X and Tank's total capacity = T
Now, X - 200 = 3T/7

So, if we know X we could solve for T.

1. Suff.
2. Tricky but Suff. Since T - 1600 = 3T/7
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Re: When 200 gallons of oil were removed from a tank [#permalink]  22 Jul 2015, 01:06
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Re: When 200 gallons of oil were removed from a tank   [#permalink] 22 Jul 2015, 01:06
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