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# The size of a TV screen is given as the length of the

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Intern
Joined: 23 May 2008
Posts: 48
The size of a TV screen is given as the length of the [#permalink]

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08 Dec 2008, 11:37
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

The size of a TV screen is given as the length of the screen's diagonal. If the screens were flat, then the area of a square 21" screen would be how many square inches greater than the area of a 19" screen? (mba.com test)
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Joined: 30 Nov 2008
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Schools: Fuqua

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08 Dec 2008, 14:04
1
KUDOS
MY answer would be 40 Sq Inches. Here is my explanation.

The TV screens are square shaped and the diagnols are given. One square diagnol is 21 inches and the other is 19 inches.

Area of the square given the diagnols is d^2 / 2 where d is the diagnol.

The question asked is the difference in the areas = 1/2 (21^2 - 19^2) = 1/2 (21+19)(21-19) = 40.

Ans is 40.
Re: Ratio? Proportion?   [#permalink] 08 Dec 2008, 14:04
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# The size of a TV screen is given as the length of the

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