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MGMAT IR question - Calculate floor plan

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by GMATGuruNY » Tue Aug 13, 2013 11:17 am
gmattesttaker2 wrote:Hello,

Can you please assist with this IR question? This is from MGMAT CAT:

OA:
1st answer: [spoiler] 1/3[/spoiler]
2nd answer: 45


I was clear with the 2nd answer. Just was not clear how the 1st answer was calculated. Thanks for your help.
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The red rectangle = the two bedrooms.

Question: The COMBINED AREA of the two bedrooms represents approximately what percentage of the apartment's INDOOR square footage?

Total area of the two bedrooms = b*h = 19.5 * 13.5.
Total area of the indoor space = b*h = 19.5 * 41.
bedrooms/total = (19.5 * 13.5)/(19.5 * 41) = 13.5/41 ≈ 13/39 ≈ 1/3.
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by ashygoyal » Tue Jun 27, 2017 7:57 am
Hi,
My doubt with regards to first question is - What is indoor square footage? If its equal to L*B, why is patio area not included?
While solving I took total area of house (including patio) into consideration and therefore got wrong answer!
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by [email protected] » Tue Jun 27, 2017 10:07 am
Hi ashygoyal,

GMAT questions are often specifically worded so that you know which specific ideas to focus on (for example, the phrase "odd integers" refers to a more specific group of numbers than the word "integers" does).

Here, the first question refers to the INDOOR square footage - this mans that we should think only about the area of the floor plan that is INSIDE the apartment. The OUTDOOR patio is not part of that space (since it's OUTDOORS).

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