SOLUTION: 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?

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Question 433963: 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
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
4bxb=80
4b2=80
b2=20
b=2√5
4b=8√5 which is close to 18..