Question

Concrete can be purchased by the cubic yard. How much will it cost to pour a circular slab 18 ft in diameter by 3 in. for a patio if the concrete costs $40.00 per cubic yard?

Answer 1

280 dollars
Glad I could help

Answer 2

Answer: Thus cost of concrete to pour the circular slab is $ 94.25

Explanation:

Given

Diameter of circular slab, d=18 ft

Thickness of slab , t= 3 inches = 0.25 ft

Rate of concrete , R = $40.00 per cubic yard

Volume of the slab ,
`V=(\pi d^(2)t)/(4)=(\pi * 18^(2)* 0.25)/(4) ft^(3)=63.6 ft^(3)`

Now 1 cubic yard = 27 cubic feet

Therefore volume ,
`V=63.6 ft^(3)=(63.6)/(27)yard^(3)=2.356yard^(3)`

=> cost of concrete ,
`C=V* R=\$ 2.356* 40=\$ 94.25`

Thus cost of concrete to pour the circular slab is $ 94.25