EM-2166

Volume and surface area of solids

E Math · Secondary 4 · Hard · Volume and surface area of solids

A cone of radius 5 cm and slant height 13 cm is open at the top. It is mounted on a solid hemisphere of radius 5 cm. The inside of the cone and hemisphere are completely filled with paint. Find the total area of the surface in contact with the paint, in

\text{cm}^2

$3.61\times10^2\,\text{cm}^2$
$1.15\times10^2\,\text{cm}^2$
$4.07\times10^2\,\text{cm}^2$
$2.50\times10^2\,\text{cm}^2$

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