Question

A cone-shaped building has a height of 11.4 meters and a base with a diameter of 12 meters. The building will be filled with road salt that costs $20 per cubic meter.

How much will it cost to fill the building with road salt?
Use 3.14 for π.

Answer 1

The actual answer is 8591.04

Explanation:

I'm in K12 and it said that 8591.04 is the right answer

Answer 2

We know, Volume of a Cone = πr² h/3
v = 3.14 * (6)² * 11.4/3
v = 3.14 * 36 * 3.8
v = 429.552

Now, for 1 m³, it costs = $20
So, for 429.552 m³, it will be: 20 * 429.552 = 8591

In short, Your Answer would be $8591

Hope this helps!