SOLUTION: If 90 feet of wire weighs 18 pounds, then what will 100 feet of the same type of wire weigh?

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Question 547379: If 90 feet of wire weighs 18 pounds, then what will 100 feet of the same type of wire weigh?
Found 3 solutions by stanbon, josmiceli, Mathwiz6:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If 90 feet of wire weighs 18 pounds, then what will 100 feet of the same type of wire weigh?
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Use a proportion:
x/100 = 18/90
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x = (10/9)18
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x = 20 lbs.
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Cheers,
Stan H.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
1 foot of wire weighs
+18%2F90+=+.2+ pounds
100 ft of wire weighs
+.2+%2A100+=+20+ pounds

Answer by Mathwiz6(3) About Me  (Show Source):
You can put this solution on YOUR website!
First- divide 18 by 90
= (fraction) 1/5 pound per foot
Second- 100 multiplied by 1/5
= 20