Question

A cone of radius 14 cm qnd slant height 20cm is mounted on a hemisphere of same radius. find the total surface area​

Answer 1

Answer:

total surface area =

CSA of cone + CSA of hemisphere.

$\pi \: r.l \: + \: 2.\pi. {r}^{2} \\ \\ \pi r( l+2 r) \\ \\ \frac{22}{7} \times 14(20 + 2 \times 14) \\ \\ 22 \times 2(20 + 28) \\ \\ 44 \times 48 \\ \\ = 2112 {cm}^{2}$

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