v = 3 πr^2 h
v = \frac{πrh}{3}
v = \frac{πr^2h}{3}
v = 3πrh
Correct answer is C
square both sides to remove the big square root
→ r^2 = \frac{3v}{πh}
cross multiply
3v = r^2 * πh
v = \frac{πr^2h}{3}
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