1.

The curved surface area of a sphere will be …………… , whose radius is 10 cm.(A) 239π (B) 400π (C) 221π (D) 129π

Answer»

Correct option is: (B) 400π

Given that radius of the sphere is r = 10 cm

\(\therefore\) Curved surface area of the sphere = 4\(\pi r^2\)

= 4\(\pi\) \(\times\) \(10^2\) = 400 \(\pi\)\(cm^2\) 

Correct option is: (B) 400π



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