Question

A concrete pillar has the shape of a cylinder. It has a radius of 3 m and a height of 7 m. If concrete cost $116 per cubic meter how much did the concrete cost for the pillar?

Answer 1

Answer: the concrete cost for the pillar is $22947.12

Step-by-step explanation:

The formula for determining the volume of a cylinder is expressed as

Volume = πr²h

Where

r represents the radius of the cylinder.

h represents the height of the cylinder.

π is a constant whose value is 3.14

The cylindrical concrete pillar has has a radius of 3 m and a height of 7 m. Therefore, the volume of concrete cylinder would be

Volume = 3.14 × 3² × 7 = 197.82 cubic meter

If concrete cost $116 per cubic meter, the cost of the concrete would be

116 × 197.82

= $22947.12

Answer 2

Answer:

$22,968

Step-by-step explanation:

To solve this question, we need to find the volume of the cylinder. Let’s call this V

Mathematically V = πr2h

where r = 3m , h = 7m and π = 22/7

Putting this in the formula:

V = 22/7 * 3 * 3 * 7 = 198 cubic meter

We are told concrete costs $116 per cubic meter. Hence, for 198 cubic meter we have 198 * 116 = $22,968