Question

If the lateral surface area of a cylinder is 251.2 cm2 and its height is 10 cm, then find the radius of its base.

[Take π = 3.14]

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Answer 1

Lateral surface area

=} 251.2 cm² = 2πrh

=} 251.2 cm² = 2 × 3.14 × r × 10 cm

=} r = 2512

2 × 314

=} r = 2512/628

=} r = 4 cm

Answer 2

Answer:

Let radius of cylinder = r cm

Height (h) = 10 cm

Lateral Surface = 251.2 cm²

Curved Surface area of cylinder = 251.2 cm²

2πrh = 251.2

2 × 3.14 × r × 10 = 251.2

r = 251.2 / 2 × 3.14 × 10

r = 4cm

Step-by-step explanation:

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