Question

A swimming pool is in the shape of a rectangular prism. The pool is 4 feet deep. Its length is 4 times its width. The volume of the pool is 6400 cubic feet. Find the length and width of the pool.
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Answer 1

V = LWH

6400 = (4W) * W * 4
1600 = 4W^2
400 = W^2
W = 20
L = 4(20)
L = 80

W = 20 ft
L = 80 ft