SOLUTION: In a mixture of concrete there are four pounds of cement mix for each pound of gravel. If the mixture contains 145 pounds of these two ingredients how many pounds of gravel are the

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Question 778994: In a mixture of concrete there are four pounds of cement mix for each pound of gravel. If the mixture contains 145 pounds of these two ingredients how many pounds of gravel are there?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
The formula in mass parts is 4+1=5 parts. This means the formula is 4%2F5 cement and 1%2F5 gravel.

145%2A%281%2F5%29=29 pounds of the gravel, so by subtraction, the rest would be cement.