##
If the area of a circle is 154 cm
^{
2
}
, then its perimeter is

## (A) 11 cm (B) 22 cm (C) 44 cm (D) 55 cm

Chapter 11 Class 10 Areas related to Circles

Serial order wise

Last updated at April 16, 2024 by Teachoo

Question 1 If the area of a circle is 154 cm2, then its perimeter is (A) 11 cm (B) 22 cm (C) 44 cm (D) 55 cm Now, Area of circle = 𝜋r2 154 = 𝟐𝟐/𝟕 × r2 154 × 7/22 = r2 7 × 7 = r2 49 = r2 r2 = 49 r2 = 72 r = 7 cm Now, Perimeter = 2𝜋r = 2 × 22/7 × 7 = 2 × 22 = 44 cm So, the correct answer is (C)