SOLUTION: In a mixture of​ concrete, there are five lb of cement mix for each pound of gravel. If the mixture contains a total of 90 lb of these two​ ingredients, how many pounds

Algebra.Com
Question 1030336: In a mixture of​ concrete, there are five lb of cement mix for each pound of gravel. If the mixture contains a total of 90 lb of these two​ ingredients, how many pounds of gravel are​ there?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
Almost a simple proportion.

c for amount of cement mix
g for amount of gravel


The proportion you might want to arrange is using . Using this ratio to set a proportion will mean you may use g as your main variable, and then .



Upon seeing the units taken care well,
;
Go from there.....
Answer by ikleyn(52787)   (Show Source): You can put this solution on YOUR website!
.
In a mixture of concrete, there are five lb of cement mix for each pound of gravel.
If the mixture contains a total of 90 lb of these two ingredients, how many pounds of gravel are there?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

Group (mentally) 5 lb of cement with 1 pound of gravel.
You will get groups of cement-gravel of total weight 6 pounds each.

The number of groups is  = 15.

So, there are 15 lb of gravel in the mixture.


RELATED QUESTIONS

In a mixture of concrete, there are five lb of cement mix for each pound of gravel. If... (answered by josmiceli)
In a mixture of concrete, there are five lb of cement mix for each pound of gravel. If... (answered by josgarithmetic)
in a mixture of concrete, there are two lb of cement mix for each pound of gravel. if the (answered by macston)
in a mixture of concrete there are three lb of cement mix for each pound of gravel .if... (answered by josgarithmetic,macston,lwsshak3)
In a mixture of​ concrete, there are two lb of cement mix for each pound of gravel. If... (answered by ikleyn)
In a mixture of concrete, there are 3 lb of cement mix for each pound of gravel. If the... (answered by DWL)
In a mixture of concrete, there are 3 lb of cement mix for each pound of gravel. If the... (answered by jorel1380)
In a mixture of concrete, there are three Ib of cement mix for each pound of gravel. If... (answered by josgarithmetic)
In a mixture of concrete there are 3lbs of cement mix for every 1lb of gravel. If the... (answered by 303795)