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The height of a right circular cylinder is 15 cm and its volume is 577.5 cm3. Find the circumference of its circular base.
1. 25 cm
2. 27 cm
3. 22 cm
4. 34 cm

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Correct Answer - Option 3 : 22 cm

Given:

Volume of cylinder = 577.5 cm3.

Height of cylinder = 15 cm

Formula used:

Volume of cylinder = πr 2h

Circumference of circle = 2πr 

Here, r = radius, h = height

Calculation:

Volume of cylinder = 577.5 cm3.

⇒ πr 2h = 577.5 cm3

⇒ (22/7) × r2 × 15 = 577.5 

⇒ r2​ = (577.5 × 7)/(22 × 15)

⇒ r2​ = 12.25 cm2

⇒ r = 3.5 cm

Circumference of circle = 2 × (22/7) × 3.5 = 22 cm

∴ The circumference of its circular base is 22 cm.

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