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Math Expert
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Re: Two trees have a combined height of 60 feet, and the taller tree is x [#permalink]
let height of small tree is A and that of taller tree is B
so \(A+B=60\)
\(B=xA\)
so
\(A+xA=60\)
\(A(1+x)=60\)
\(A=\frac{60}{(1+x)}\)
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Re: Two trees have a combined height of 60 feet, and the taller tree is x [#permalink]
Expert Reply
Hi All,

We're told that two trees have a combined height of 60 feet and the taller tree is X times the height of the shorter tree. We're asked to find the height of the shorter tree in terms of X. This question can be approached in a couple of different ways, including by TESTing VALUES.

IF the shorter tree is 10 feet tall and the taller tree is 50 feet tall, then X = 5. Thus, we're looking for an answer that equals 10 when we plug X=5 into it. After checking all five answers, there's only one that matches...

Final Answer:

GMAT assassins aren't born, they're made,
Rich
GMAT Club Bot
Re: Two trees have a combined height of 60 feet, and the taller tree is x [#permalink]
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Math Expert
94433 posts