Surface Area And Volume Of Spheres - SS3 Mathematics Past Questions and Answers - page 1

\[Surface\ area\ of\ a\ sphere = 4\pi r^{2}\]

\[diameter = 14cm\ \therefore radius = 7cm\ \]

\(Surface\ area\ of\ a\ sphere = 4 \times \frac{22}{7} \times \frac{7^{2}}{1} = 616cm^{2}\)

\[Volume\ of\ a\ sphere = \ \frac{4}{3}\pi r^{3}\]

\[diameter = 14cm\ \therefore radius = 7cm\]

\(Volume\ of\ a\ sphere = \ \frac{4}{3} \times \frac{22}{7} \times 7^{3} = 1,437.33{cm}^{3}\)

\[Surface\ area\ of\ a\ sphere = 4\pi r^{2}\]

\[radius = 6,371\ km\ \]

\[Surface\ area\ of\ a\ sphere = 4 \times \frac{22}{7} \times \frac{{6,371}^{2}}{1} = 510,269,773\ km^{2}\]