The length of the width of the rectangle will be 45 inches.
The sum of all the sides of the rectangle will be known as the perimeter of the rectangle.
Let L be the length and W be the width of the rectangle.
Then the perimeter of the rectangle will be
Perimeter of the rectangle = 2(L + W) units
The perimeter of the roof is 216 inches the length of the roof is 63 inches.
The length of the width of the rectangle will be
P = 2(L + W)
216 = 2(63 + W)
108 = 63 + W
W = 108 - 63
W = 45 inches
The length of the width of the rectangle will be 45 inches.
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