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

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Math Expert
Joined: 02 Sep 2009
Posts: 50572
The size of a TV screen is given as the length of the screen's diagona  [#permalink]

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11 Sep 2018, 00:43
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(N/A)

Question Stats:

71% (01:32) correct 29% (00:48) wrong based on 7 sessions

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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 27-inch screen would be how many square inches greater than the area of a square 25-inch screen?

A. 52
B. 65
C. 78
D. 104
E. 208

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Concentration: Strategy, General Management
The size of a TV screen is given as the length of the screen's diagona  [#permalink]

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11 Sep 2018, 01:32
1
Bunuel wrote:
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 27-inch screen would be how many square inches greater than the area of a square 25-inch screen?

A. 52
B. 65
C. 78
D. 104
E. 208

a1$$\sqrt{2}$$=27 = > a1= 27/$$\sqrt{2}$$
a2$$\sqrt{2}$$=25 = > a2 = 25/$$\sqrt{2}$$

difference in area = $$\frac{1}{2}$$( $$(27)^2$$ - $$(25)^2$$) =$$\frac{1}{2}$$*(27+25)(27-25) = $$\frac{104}{2}$$= 52
The size of a TV screen is given as the length of the screen's diagona &nbs [#permalink] 11 Sep 2018, 01:32
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