Problema Solution
The formula for the perimeter of a rectangle is P= 2l + 2w , where l is the length and w is the width. A rectangle has a perimeter of 24 inches. Find its dimensions if its length is 3 inches greater than its width.
Answer provided by our tutors
Let width = x because it is unknown.
Let length = x + 3" because it is 3" greater.
P = 2L + 2W
24" = 2(x+3") + 2(x)
24" = 2x + 6" + 2x
24" - 6" = 4x
18" = 4x
18"/4 = x
4.5" = x
To check the answer go back and substitute 4.5" for x in the equation and see if you get a perimeter of 24".
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