If the diameter of a sphere is 63 cm, then what is the total surface area of the sphere?

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SSC CGL 2022 Tier-I Official Paper (Held On : 02 Dec 2022 Shift 1)
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  1. 11824 cm2
  2. 12836 cm2
  3. 12474 cm2
  4. 11248 cm2

Answer (Detailed Solution Below)

Option 3 : 12474 cm2
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Detailed Solution

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Given:

Diameter of sphere = 63 cm

Formula used:

Total surface area of a sphere = 4πr2

Calculation:

Radius = 63/2 cm

Total surface area of a sphere = 4πr2

⇒ 4 × 22/7 × 63/2 × 63/2

⇒ 22 × 9 × 63

∴ Area is 12474 cm2

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