SOLUTION: THE PERIMETER OF A POOL IS 30 FT. IT IS TWICE AS LONG AS IT IS WIDE. WHAT IS THE LENGTH OF THE POOL.

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Question 159350: THE PERIMETER OF A POOL IS 30 FT. IT IS TWICE AS LONG AS IT IS WIDE. WHAT IS THE LENGTH OF THE POOL.
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!

Perimeter=2%28L%2BW%29
But, L=2W, twice as long as its width
So,
P=2%282W%2BW%29
30ft=4W%2B2W
30ft=6W -----> cross%2830%295ft%2Fcross%286%29=cross%286%29W%2Fcross%286%29
W=5ft
And, L=2%2A5=10ft
Check,
30ft=2%2810%2B5%29
30ft=2%2815%29
30ft=30ft
Thank you,
Jojo