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A rectangular retaining wall has area 28 square feet. The height of the wall is three feet less than its length. Find the height and the length of the wall in feet.

 

Find the Length and Height

 Apr 18, 2020
 #1
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H  x  L  = 28 ft2  

 

H = L-3     subst this in

(L-3)    x  L = 28

L^2 -3L -28 = 0      use Quadratic Formula to find   L  =   7ft    or  -4 (throw out)

 

The   H = 7-3 = 4 ft

 Apr 18, 2020

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