SOLUTION: The cement to sand to gravel for bridge contruction is 3:4:6 if you need 1520 square yards to complete the job how much of each element do you need?

Question 795214: The cement to sand to gravel for bridge contruction is 3:4:6 if you need 1520 square yards to complete the job how much of each element do you need?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
The cement to sand to gravel for bridge contruction is 3:4:6 if you need 1520 square yards to complete the job how much of each element do you need?
:
I think you mean cubic yards here, but anyway
Let x = the multiplier
3x + 4x + 6x = 1520
13x = 1520
x = 1520/13
x ~ 117 is the multiplier
:
You need:
3*117 = 351 cu/yds of cement
4*117 = 468 cu/yds of sand
6*117 = 702 cu/yds of gravel
;
You can check this by finding the total of these 3
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