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What is the length in meters of a certain rectangular garden?

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What is the length in meters of a certain rectangular garden?  [#permalink]

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New post 10 Jun 2018, 03:34
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

77% (00:57) correct 23% (00:46) wrong based on 28 sessions

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What is the length in meters of a certain rectangular garden?

(1) The length of the garden is 6 meters more that twice the width.
(2) The length of the garden is 4 times the width.

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Re: What is the length in meters of a certain rectangular garden?  [#permalink]

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New post 10 Jun 2018, 04:55
At a glance, the answer would be E. However, thinking about it again, we actually get two equations with two variables from this.

Assuming the length is x and the width is y, we have from (1) and (2):
x=2y+6
x=4y

Put them together, and we get 2y+6=4y, i.e. 2y=6, i.e. y=3. Now that we know the width, we can figure out the length through either (1) or (2). To be certain, we should plug it in just to verify our calculations. So with (1), x=2*3+6=12. (2) would be x=4*3=12.

So the answer is C.
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Re: What is the length in meters of a certain rectangular garden? &nbs [#permalink] 10 Jun 2018, 04:55
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What is the length in meters of a certain rectangular garden?

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