Question

If the curved surface area of a solid sphere is $98.56{cm}^2$, then find the radius of the sphere.

• A. $2.8cm$
• B. $28cm$
• C. $6.8cm$
• D. None of these

Answer 1

Answer: (A)

$2.8cm$

Consider the given curved surface area $=98.56c{m}^2$

We know that the curved surface area of the sphere

$=4\pi r^2$

So,

$4\pi r^2=98.56$

$\pi r^2=24.64$

$r^2=7.84$

$r=2.8cm$

Hence, this is the answer.