The length of a rectangle is 3 times its width. If the perimeter of the rectangle is 48 inches, how do you find the length?

##L=18## inches

Perimeter ##P=48## ##L=3w##

##P=2*L+2*w##

##48=2(3w)+2w## ##48=6w+2w## ##48=8w## ##w=48/8## ##w=6##

solve now length ##L##

##L=3w=3*6=18## ##L=18##

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