SOLUTION: The perimeter of a rectangular concrete slab is 90 feet and its area is 416 square feet. What is the length of the longer side of the slab?

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Question 945544: The perimeter of a rectangular concrete slab is 90 feet and its area is 416 square feet. What is the length of the longer side of the slab?
Answer by Alan3354(69443) About Me  (Show Source):
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The perimeter of a rectangular concrete slab is 90 feet and its area is 416 square feet. What is the length of the longer side of the slab?
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2L + 2W = 90
L + W = 45
L*W = 416
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Find a pair of factors of 416 with a sum of 45.