SOLUTION: A rectangle is three times as long as it is wide. The perimeter is 24 m. Find the length.

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Question 294727: A rectangle is three times as long as it is wide. The perimeter is 24 m. Find the length.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
"three times as long as it is wide"
L=3W
"perimeter is 24 m"
P=2%2AL%2B2%2AW=24
L%2BW=12
Substitute from above,
3W%2BW=12
4W=12
W=3
Then from above,
L=3W=3%283%29=9
The rectangle is 3m x 9m.