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andrew11 [14]
3 years ago
12

If a mixture of 24 lb. of cement, 48 lb. of sand, and 63 lb. of gravel is needed to make 1 cubic foot of concrete, how many poun

ds of sand are needed to pour a pool deck of 156 cubic feet?
Mathematics
1 answer:
Radda [10]3 years ago
4 0
This is a ratio problem. You only need solve the ratio of the sand. 

 <u> 48 </u> <u />  =  <u>  n  </u>   <u />  
    1        156

(48)(156) = 1(n)   (cross multiplying)<span> 
</span>
7,488 pounds

To check: The pool deck is 156 times larger than the original amount of concrete so the amount of sand needs to be 156 times more. 



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