1 Answer

Nivash · Answer 1 · 2023-06-27T22:27:44+0000

The figure given is a sphere

A surface area of a sphere is given by

$A=4\pi r^2$

The diameter of the sphere is given to be 42 cm

The radius of the sphere is half the diameter =

$r=(42)/(2)=21\operatorname{cm}$

Substituting the value of r into the formula

$\begin{gathered} A=4*\pi*21^2 \\ A=5541.8\operatorname{cm}^2 \end{gathered}$

The correct answer is option A

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