Answer:
Length = 18 inches
Width = 9 inches
Explanation:
Formula:
Perimeter of rectangle with length 'l' and width 'b' is given by,
Perimeter = 2(l + b)
It is given that,The width of a rectangle is 9 inches less than the length. The perimeter is 54 inches.
Let 'l' be the length of the rectangle, then width is ( l - 9)
Perimeter = 54 inches
To find the length and width
Perimeter = 2(l + b) = 2(l + l - 9) = 54
2(2l - 9 ) = 54
4l - 18 = 54
4l = 54 + 18
4l = 72
l = 72/4 = 18 inches
Therefoe length = 18 and width = l - 9 = 18 - 9 = 9 inches