What is the surface area of a sphere who

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 2D

Question:

What is the surface area of a sphere whose diameter is 30 cm? [Use π = 3.14.]

Options:

1134

2826

1413

1130

Correct Answer:

2826

Explanation:

We know that,

Surface area of a sphere = 4πr²

Diameter = 30

then, Radius = 15

Surface area of the sphere = 4 × 3.14 × (15)² = 2826cm²