If the diameter of a sphere is 63 cm, th

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 2D

Question:

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

Options:

11824 cm²

12836 cm²

12474 cm²

11248 cm²

Correct Answer:

12474 cm²

Explanation:

We know that,

Surface area of a sphere = 4πr²

Diameter of sphere = 63 cm

Now,Radius =\(\frac{63}{2}\)

Area = 4 × \(\frac{22}{7}\) × \(\frac{63}{2}\) × \(\frac{63}{2}\) = 22 × 9 × 63 = 12474