The ratio of the side lengths of a rectangle with an area of 80 square yards is 4:1. Which of the following is closest to the length, in yards, of the longer side of the rectangle?

a) 10 b) 16 c) 18 d) 32 e)40

a) 10 b) 16 c) 18 d) 32 e)40

This question still have no answer summary yet.

4bxb=80
4b2=80
b2=20
b=2√5
4b=8√5 which is close to 18..

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