Q. 705.0( 2 Votes )

The total surface area of a hemisphere of radius 7 cm is
A. (588π) cm2

B. (392π) cm2

C. (147π) cm2

D. (98π) cm2

Answer :

Given: Radius of the hemisphere: 7cm .

TSA of the hemisphere is given by: 3πr2

Let S be the TSA of the hemisphere.

S = 3πr2

S = 3 × π × (7)2 = 147π cm2

TSA of the hemisphere is 147π cm2

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