Correct Answer: Option D

Explanation

r= 4cm; base area = \(\pi\)r²; Curve S.A = 2\(\pi\)rh

\(\frac{base area}{curved area}\) = 1/4; \(\pi\)/2\(\pi\)rh

=h = \(\frac{4 x 4cm}{2}\)

h= 8cm

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