Question : The radius of a sphere is 14 cm. What is the surface area of this sphere? [Use $\pi=\frac{22}{7}$]
Option 1: 2464 cm2
Option 2: 1232 cm2
Option 3: 1848 cm2
Option 4: 616 cm2
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Correct Answer: 2464 cm 2
Solution : Given: Radius, $r$ = 14 cm The total surface area of a sphere $= 4\pi r^{2}$ $=4\pi (14)^{2}$ $=4\times \frac{22}{7}\times 196$ $=2464$ cm 2 Hence, the correct answer is 2464 cm 2 .
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Question : The surface area of a sphere is 2464 cm². Find the radius of the sphere. [Use $\pi=\frac{22}{7}$ ]
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