finding length

Question

the length of a rectangle is 8 cm more than 3 times its width, the rectangles perimeter is 64 cm. show the dimensions of the rectangle.

Answer 1

L=length
W=width

L=8+3W

 

Perimeter=2l+2w=64 or
2(8+3W)+2W=64
16 + 6W + 2W=64
8W=48
W=6
L=8+3(6)=26