SOLUTION: a rectangular beam needs to be 1/5 as wide as it is high. what is the width and height of each of the following beams that have the cross-sectional area of: a. 22.578125 square

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Question 377373: a rectangular beam needs to be 1/5 as wide as it is high. what is the width and height of each of the following beams that have the cross-sectional area of:
a. 22.578125 square inches
b. 137.8125 square inches
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
0.2x*x=22.578125
0.2x^2=22.578125
x^2=112.89
x=10.625
0.2x=2.125