The length of a rectangle is three times it's width. If the perimeter of the rectangle is 64, find its length and width
Accepted Solution
A:
set up an equation for the perimeterl = length w = width2l + 2w = 64set up another equation as you know the length is 3 times the widthw = 3lsubsitute w = 3l into the 2l + 2w = 642l + 2(3l) = 64solve for l2l + 6l = 648l = 64length = 8subsitute into w = 3lw = 3(8)width = 24