3.5cm
5cm
7cm
9cm
Correct answer is D
From \(V = \frac{1}{3}\pi r^2 h. \hspace{1mm} r =\frac{14}{2}\\ 462 = \frac{1}{3} \times \frac{22}{7} \times 7^2 \times h \\ h = \frac{3 \times 462}{22 \times 7}\\ h = 9\)
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