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Q.

Curved surface area of solid sphere is $24 c m^{2}$ . If the sphere is divided into two hemispheres, then the total surface area of one of the hemispheres is

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a

18 c m^{2}

b

8 c m^{2}

c

12 c m^{2}

d

16 c m^{2}

answer is D.

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Detailed Solution

Surface area of sphere,

4 π r^{2} = 24

$π r^{2} = 6$

C.S.A of hemispheres $= 3 π r^{2} = 18 c m^{2}$

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Curved surface area of solid sphere is 24cm2 . If the sphere is divided into two hemispheres, then the total surface area of one of the hemispheres is