The total surface area of a hemisphere of radius 7 cm is

Question:

The total surface area of a hemisphere of radius 7 cm is
(a) (588π) cm2
(b) (392π) cm2
(c) (147π) cm2
(d) (98π) cm2

Solution:

(c) (147π) cm2

Radius of the hemisphere = 7 cm

Total surface area of the hemisphere $=$ Curved surface area of hemisphere $+$ Area of the circle $=3 \pi r^{2}$

$=(3 \pi \times 7 \times 7) \mathrm{cm}^{2}$

$=(147 \pi) \mathrm{cm}^{2}$

 

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