Question

Then
Area of a given circle is 154 sq cm.
find its circumference ?​

Answer 1

Answer:

Step-by-step explanation:

1. Given: The area of the circle = 154 cm²

2.To find: The circumference of the circle.

3.Calculation: Let 'r' be the radius of the circle. Area of the circle = πr² => πr² = 154. (22/7)r² = 154. r² = 49. r = 7 cm. => Circumference of the circle = 2πr. = 2×(22/7)×7. = 44 cm.

4. The circumference of the circle is 44 cm.

Answer 2

ANSWER:

44cm

STEP BY STEP EXPLANATION:

$area \: of \: circle \: = \pi {r}^{2} \\ 154 = \frac{22}{7} \times {r}^{2} \\ {r}^{2} = \frac{154 \times 7}{22} = 49 \\ r \: = \sqrt{49} = 7cm \\ Circumference \: of \: circle \: = 2\pi \: r \\ = 2 \times \frac{22}{7} \times 7 \\ = 44cm$