Posted by Kimmie on Wednesday, September 22, 2010 at 10:39am.
2.5/7 = x/300 for sand
3.5/7 = x/300 for gravel
In each case, solve for x.
I figured it out, and actually you multiply the 2.5 by 300 and then the 3.5 by 300 to get the amount of sand and gravel!!
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