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The radii of two right circular cylinders are in the ratio of $2 : 3$ and their heights are in the ratio of $5 : 4$ The ratio of their curved surface areas is
$\frac{3}{5}$
$\frac{5}{6}$
$\frac{4}{5}$
$\frac{8}{9}$

A

\frac{5}{6}

B

\frac{8}{9}

C

\frac{3}{5}

D

\frac{4}{5}

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