A right circular cone has a height of 9 cm, and a volume of 108π cm3. What is r (the radius of the cone)?
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Answer:
6 cm
Step-by-step explanation:
[tex]π {r}^{2} \frac{h}{3} = V \\ \\ 108π = π{r}^{2} \frac{9}{3} \\ \\ 108π = π{r}^{2}(3) \\ \\ 36π = πr^{2} \\ \\ 6 = r[/tex]
* When we are talking about radii, we want the NON-NEGATIVE root.
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