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If the area of a circle is 154 cm2, then the circumference of the circle is:
1. 22 cm
2. 44 cm
3. 36 cm
4. 11 cm

1 Answer

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Correct Answer - Option 2 : 44 cm

Given:

Area of a circle = 154 cm2

Formula used:

Area of a circle = πr2

Circumference of a circle = 2πr 

Calculation:

πr2 = 154

⇒ 22/7 × r2 = 154 

⇒ r2 = 154 × 7/22 = 72

⇒ r = 7

∴ Circumference of a circle = 2 × 22/7 × 7 = 44 cm 

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