Question

Mr. Smith built a rectangular-shaped sandbox for his children, measuring 4 feet by 4 feet by 6 inches. Sand has a density of approximately 100 pounds per cubic foot and is sold in 50-pound bags for $3.50 each. How much will it cost Mr. Smith to completely fill the sandbox?

Answer 1

$56.

Explanation:

The volume of the box = 4 * 4 * 1/2 = 8 cu ft.

So the weight of sand required = 100* 8 = 800 lbs.

Therefore he requires 800 / 50 = 16 bags of sand.

The cost will be 16 * 3.50

= $56