Question

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 pounds of sand are needed to pour a pool deck of 156 cubic feet?

_____ pounds

Answer 1

@kymber

Answer 2

All you need to know is 48 pounds of sand, so ignore the other weights. It says there is 48 pounds of sand in one cubic foot of concrete. We want to know how many pounds of sand is in 156 cubic feet. Can you dig it?

Answer 3

156/48??

Answer 4

No! It would be multiplying since we know what one cubic foot is, and we want to know what MORE cubic feet would be. The answer would be higher than the original, so we multiply. If the answer was going to be less, than we would divide.

Answer 5

7,488

Answer 6

Yepp!