Question 464792: l=? w=?
A= 120m
P=46m
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! l=? w=?
A= 120m
P=46m
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P = 2(L+W) = 46
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L+W = 23
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A = LW = 120
L = 120/W
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Solve the two equation system:
L+W = 23
L = 120/W
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Substitute for "L" and solve for "W":
(120/W)+W = 23
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120 + W^2 = 23W
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W^2 - 23W + 120 = 0
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W = [23+- sqrt(23^2-4*1*120)]/2
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W = [23 + sqrt(49)]/2
--
W = 15 m
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Solve for "L":
L + W = 23
L + 15 = 23
L = 8 m
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Cheers,
Stan H.
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