Problem 375
A U.S. nickel contains 3 ounces of copper for every ounce of nickel. How much nickel is required for 14 pounds of copper?
Solution
Suppose we require x ounces of nickel
1*224 = x*3
3x = 224
x = 
x = 74.67 ounces
We require x ounces of nickel 74.67 ounces