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GMAT prep - two triangles areas

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Source: — Problem Solving |
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by neerajkumar1_1 » Sat Oct 16, 2010 4:15 am
see the wording...
the area of PQR is what fraction of LMN
in other words
PQR/LMN = what

8/72 = 1/9
Pick A
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by shovan85 » Sat Oct 16, 2010 11:57 am
andre.heggli wrote:Added a screen shot so you could see the whole question.
Image

Thanks!
If you subtract Triangle PQR from Triangle LMN then the Triangle LMN is no more a Triangle but a weird irregular Hexagon name MLPQRN ;) So you cannot subtract it from LMN.

As per solving you can either calculate the individual area of each and divide or can try the below method.

We know Area = (Base*Height)/2

So Area PQR/Area LMN = [PR*height of (PQR) ] / [LN * height of (LMN)]
= 4*4/12*12 = 1/9.

Hope it helps :)
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