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Find the curved surface area (C.S.A.) and total surface area (T.S.A.) of a solid hemisphere of radius .

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answer is B.

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Detailed Solution

The radius of a hemisphere is 14cm14cm .
seo

Surface area of a sphere

Curved surface area of a hemisphere =

of surface area of a sphere
⇒ Curved surface area of a hemisphere =

Curved surface area of a hemisphere =

Therefore, from above we see that the curved surface area of a hemi sphere of radius

∴Total surface area (T.S.A.) of a hemisphere = Curved surface area (C.S.A.) + Area of a circle formed.
⇒ Total surface area of a hemisphere =

⇒ Total surface area of a hemisphere

Substituting value of radius r

in the above equation. We have, Question Image

Therefore, from above we see that the total surface area of a hemisphere of radius

So, option 2 is correct.

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