Question

The volume of a cone is 251.2 cubic inches. The height of the cone is 15 inches. What is the radius of the cone, rounded to the nearest inch? Use pi = 3.14. (5 points)

Answer 1

251.2 = $\frac{1}{3}$ (3.14)(r^2)(15)
251.2 = $\frac{1}{3}$ (47.1) (r^2)
251.2 = (15.7)(r^2)
251.2 ÷ 15.7 = 16 15.7 ÷ 15.7 = 1
16 ≈ r^2
$\sqrt{16} \sqrt{r^2}$
4 ≈ r
Answer: the radius is 4 inches

Answer 2

4 would be the radius. Hope this helped!