A 4inch-thick concrete slab is being poured for a circular patio 14 feet in diameter. Concrete costs $55 per cubic yard. Find the cost of the concrete, to the nearest cent.

Question

A 4inch-thick concrete slab is being poured for a circular patio 14  feet in diameter. Concrete costs $55  per cubic yard. Find the cost of the concrete, to the nearest cent.

rbowh · Answer

This concrete slab is a cylinder with a height of 4 inches and a circular base with a 14 foot diameter.
Volume of cylinder = pi * radius^2 * h
Substitute the values given remembering to change 4 inches to 1/3 foot.
After you find the volume ( in cubic feet ) multiply by $55..

Trish · Answer

36 foot by 13 foot