1 Answer

Simonyoung · Answer 1 · 2023-03-28T01:07:16+0000

Given a sphere with radius R, the volume and the surface area formulas are expressed as:

$\begin{gathered} V=(4)/(3)\pi R³ \\ \\ A=4\pi R² \end{gathered}$

Now, if we have a sphere of radius R = 21 cm = 0.688976 ft. Then, using the formulas:

For the volume

$\begin{gathered} V=(4)/(3)\pi(0.688976)³ \\ \\ \therefore V=1.37\text{ ft^^b3} \end{gathered}$

For the surface area

$\begin{gathered} A=4\pi(0.688976)² \\ \\ \therefore A=5.97\text{ ft^^b2} \end{gathered}$

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