SOLUTION: a rectangle is three times as long as it is wide.If it has a perimeter of 64cm,find its area
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Question 698458: a rectangle is three times as long as it is wide.If it has a perimeter of 64cm,find its area
Answer by Stitch(470) (Show Source): You can put this solution on YOUR website!
The perimeter of a rectangle is given by P = 2L + 2W
L = lengh
W = Width
Equation 1:
Equation 2:
Plug 3W into equation 2 for L
Equation 2:
Simplify
Combine like terms
Divide both sides by 8
Now plug 8 into equation 1 for W
Equation 1:
The area of a rectangle is given by A = L * W
A = 24cm * 8cm
A = 192 square cm
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