A hemispherical bowl has a radius of 3.5 cm, then its curved surface area is
A hemispherical bowl has a radius of 3.5 cm, then its curved surface area is
A) 77 cm2
B) \(\frac{231}{2 }\)cm2
C) \(\frac{539}{6 }\)cm2
D) \(\frac{77}{2 }\)cm2
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Correct option is (A) 77 cm2
r = 3.5 cm
Curved surface area of hemispherical bowl \(=2\pi r^2\)
\(=2\times\frac{22}7\times3.5\times3.5\)
\(=22\times3.5\) \(=77\,cm^2\)
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