SOLUTION: The length of a rectangle is twice its width. The perimeter is 30 meters. Find the length and the width.

Algebra ->  Rectangles -> SOLUTION: The length of a rectangle is twice its width. The perimeter is 30 meters. Find the length and the width.      Log On


   

Question 530977: The length of a rectangle is twice its width. The perimeter is 30 meters. Find the length and the width.
Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
L = 2W
.
P = 30
P = 2(L+W)
L + W = 15
L = 15-W
.
L=L
so
2W = 15-W
3W = 15
W = 5
.
L = 2W
L = 10
.
Check the perimeter.
2(L-W) = 2(10+5) = 30 m
Correct.
.
Answer: Length = 10 m, and width = 5 m.
.
Done.