Question

What is the total surface area of
a hemisphere of base 7cm.

Answer 1

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Answer 2

$\boxed{462cm^2}$

$\bold{Question =}$

What is the total surface area of a hemisphere of radius 7cm.

$\bold{Answer =}$

$\bold{Given,}$

$\bold{Radius\:of\:the\: hemisphere=7cm}$

$\bold{TSA\:of\:hemisphere=3\pi r^2}$

$\bold{3\times22/7\times7\times7}$

$\bold{[7\:gets\:cancelled]}$

$\bold{3\times22\times7}$

$\bold{462cm^2}$

$\underline{Therefore\:TSA\:of\:hemisphere = 462cm^2}$

$\bold{Extra Information}$

$\bold{Cylinder\:is\:a\:solid\:geomentrical\:figure}$

$\bold{Formula\:to\:find\:TSA\:of\:cylinder = 2\pi r(r+h)}$

$\bold{Formula\:to\:find\:CSA\:of\:cylinder = 2\pi rh}$

$\bold{Formula\:to\:find\: volume\:of\:cylinder = \pi r^2h}$

$\bold{Where,}$

$\bold{\pi=22\div7}$

$\bold{r=radius\:of\:the\:cylinder}$

$\bold{h=height\:of\:the\:cylinder}$