Question

If the area of a circle is 154 sq cm, then its circumference is:
1. 44 cm
2. 7 cm
3. 49 cm
4. 21 cm

Answer 1

Correct Answer - Option 1 : 44 cm

Given :

Area of a circle = 154 cm²

Formula used :

Area of a circle = π × r²

Circumference of a circle = 2 × π × r

Calculation :

Area of circle = 154 cm²

⇒ π × r² = 154

⇒ r² = (154×7)/22

⇒ r = 7 cm

Now, Circumference of the circle = 2× π × r

⇒ 2 × π × r

⇒ 44 cm

∴ The circumference of the circle is 44 cm