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grkmurthy
Senior Consultant


Joined: 14 Oct 2007
Posts: 37
PostPosted: Fri Nov 23, 2007 1:41 pm    Post subject: Geometry Reply with quote
A square lawn in front of a house is of 40 feet diagonal. What is the perimeter of the lawn in feet? (round off 0.5 ft and above to 1 foot).

(1) 84
(2) 121
(3) 113
(4) 96
(5) 102
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ksvickram
Senior Consultant


Joined: 02 Jan 2008
Posts: 29
PostPosted: Mon Jan 07, 2008 5:23 pm    Post subject: Reply with quote
The answer is choice 3 - 113 units.

Diagonal = a * Sqrt 2 = 40
Therefore, a = 20 * sqrt 2
Perimeter = 4a = 80 * sqrt 2 => 80 * 1.4 = 112 units...approx. to choice 3.
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