SOLUTION: a rectangle is twice as long as it is wide. what are its dimentions if it's perimeter is 186cm?

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Question 312374: a rectangle is twice as long as it is wide. what are its dimentions if it's perimeter is 186cm?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The perimeter of a rectangle is,
P=2%2A%28L%2BW%29=168
L%2BW=84
You also know,
L=2W
Substiute,
2W%2BW=84
3W=84
highlight%28W=28%29
Then
L=2W
highlight%28L=56%29