Question

Find the total surface area of a hemisphere and a solid hemisphere each of radius 10 cm. ( Use π = 3.14 )

Answer 1

Radius (r) of hemisphere = 10 cm

Total surface area of hemisphere = CSA of hemisphere + Area of circular end of hemisphere

=2πr^2+πr^2

=3πr^2

= [3*3.14*10*10] cm2.

=943cm2.


Therefore, the total surface area of such a hemisphere is 942 cm2.


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Answer 2

The surface area of the hemisphere= 2πr^2

= 2×3.14×(10)^2

= 628cm^2

The surface area of solid hemisphere=  3πr^2

= 3×3.14×(10)^2

=942cm^2