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Question : Find the surface area of a sphere whose radius is 3.5 cm. Use $(\left.\pi=\frac{22}{7}\right)$.

Option 1: 154 cm2

Option 2: 152 cm2

Option 3: 146 cm2

Option 4: 160 cm2


Team Careers360 10th Jan, 2024
Answer (1)
Team Careers360 17th Jan, 2024

Correct Answer: 154 cm 2


Solution : Given, Radius = 3.5 cm
The surface area of the sphere = $4\pi r^2$, where $r$ is the radius of the sphere.
⇒ Surface area = $4\times \frac{22}{7}\times 3.5\times 3.5=4\times 22\times 0.5\times 3.5=$ 154 cm 2
Hence, the correct answer is 154 cm 2 .

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