A right circular cylinder has volume $24\pi$ and height $6$. What is its **radius**?
A$6$
B$2$
C$4$
D$1$
Answer & Solution
Correct answer: B. $2$
$V = \pi r^{2} h \Rightarrow 24\pi = \pi r^{2} \cdot 6 \Rightarrow r^{2} = 4 \Rightarrow r = 2$.
- Trap C ($4 = r^{2}$) returns the square of the radius, not the radius.
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