Question

The length of a rectangle is six times its width. if the perimeter of the rectangle is 140 in , find its area.

Answer 1

L = 6W ---- the lenght is 6 times its width
P = 2(L + W) = 140
A =?

P = 2(L+W)
P = 2L + 2W
we know that L = 6W so we plug it into the equation
P = 2(6W) + 2W= 140
    12W + 2W = 140
14W = 140
W = 140/14
W = 10 

Lets plug 10 into the equation L = 6W
L = 6(10)
L = 60

AREA = LW
= 60 * 10
= 600