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Question -

Find the total surface area of a hemisphere and a solid hemisphere each of radius 10 cm. [Use ╧А = 3.14]



Answer -

(i) Radius of hemisphere = 10 cm
тИ┤ Totalsurface area of hemisphere = 2╧Аr2
= 2 x 3.14 x 10 x 10 cm2
= 628 cm2
(ii) Total surface area of solid hemisphere
= 3╧Аr2┬а= 3 x 3.14 x 10 x 10 cm2
= 942 cm2

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