Question

Concrete can be purchased by the cubic yard. How much will it cost to pour a slab 17 feet by 17 feet by 2 inches for a patio if the concrete costs $40.00 per cubic yard?

Answer 1

First convert the patio slab into feet. We know that there are 12 inches in 1 feet. We convert 2inches into units of feet

17ft X 17ft X 2 in (1ft/12inches) = 48.2 cubic feet


We then convert 48.2 ft^3 into cubic yard. We know there is 3 feet in 1 yard.

48.2 ft^3 X ( 1 yard / 3 feet)^3
= 48.2 ft^3 X (1 yard^3 / 27 ft^3)
= 1.79 cubic yard

To figure out the cost. We have 1.79 cubic yard for the patio.

1.79 yard^3 X ($40/yard^3) = $71.4