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

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)   (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?
-------
Use a proportion:
x/100 = 18/90
---
x = (10/9)18
---
x = 20 lbs.
================
Cheers,
Stan H.
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!
1 foot of wire weighs
pounds
100 ft of wire weighs
pounds
Answer by Mathwiz6(3)   (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

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