Question

The volume of the sphere is $38808$ cm${}^3$, find its surface area?

• A. $5544$ cm${}^2$
• B. $4455$ cm${}^2$
• C. $4545$ cm${}^2$
• D. $5454$ cm${}^2$

Answer 1

The correct option is A $5544$ cm${}^2$

$V=\frac{4}{3}\pi r^3=38804\Rightarrow r={\left(\frac{38804\times 3}{4\pi }\right)}^{1/3}$

$\Rightarrow r=21cm$

$A=4\pi r^2=5542.4\simeq 5544c{m}^2$