SOLUTION: An ore contains 18% of iron.how many tons of ore to the nearest 10 tons will yield 25 tons of iron

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: An ore contains 18% of iron.how many tons of ore to the nearest 10 tons will yield 25 tons of iron       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1007306: An ore contains 18% of iron.how many tons of ore to the nearest 10 tons will yield 25 tons of iron

Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
Iron ore yields 18% pure iron from its mass. To get 25 tons of pure iron, we need:
.18x=25
x=25/.18=138.9 tons of raw ore!!!!!!