The total surface area of a hemisphere of radius r is
A. πr²
B. 2πr²
C. 3πr²
D. 4πr²
Answers
Answer:
C. 3πr²
Csa-2πr²+πr²
Total surface area of a hemisphere, T.S.A = curved surface area + base area
Total surface area of a hemisphere of radius r is = 2πr² + πr² = 3πr²
Hence, the total surface area of a hemisphere of radius r is 3πr².
Option (C) 3πr² is correct.
Extra information :
Surface area:
Surface area of a solid object is a measure of the total area that the surface of the object occupies and it is always measured in square units.
Hemisphere:
When a plane through the centre of a sphere divides the sphere into 2 equal parts then these two equal parts are called hemisphere
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