Question

A concrete pillar has the shape of a cylinder. It has a diameter of 8 m and a height of 9 m. If concrete cost $87 per cubic meter, how much did the concrete cost for the pillar? Use 3.14 for pi and do not round your answer

Answer 1

It will cost $39,337.92 for the piller.

Explanation:

Given that,

The diameter of the cylinder, d = 8 m

Height of the cylinder, h = 9 m

If concrete cost $87 per cubic meter, we need to find how much the concrete cost for the pillar.

The volume of the cylinder is given by :

`V=\pi r^2h\\\\=3.14* (4)^2* 9\\\\=452.16\ m^3`

Cost per cubic meter = $87

Cost for 452.16 m³ will be :

C = 452.16 × 87

C = $39,337.92

Hence, it will cost $39,337.92 for the piller.