Question

Area of a circle is 49πcm2. Find its circumference​

Answer 1

Answer:

As per statement the area of a circle is 49 pie cm square. It means

We know Area of circle is πr², where r is the radius of the circle

πr^2 = 49π

r^2 = 49π/π

r^2 = 49

r = √49

r = 7 cm

The radius of the circle is 7 cm.

We know Circumference of a circle is 2πr, where r is the radius. Accordingly

Circumference = 2πr

Circumference =2 × 22/7 × 7

Circumference =44 × 7/7

Circumference = 44 cm

Answer : the circumference of the circle is 44 cm.

Answer 2

Hi... Here's your answer..

let radius of the circle be r

area = 49 pi

pi r^2 = 49 pi

r^2 = 49

r = root 49

r = 7 cm

so, perimeter = 2 pi r

                       = 2 x pi x 7

                       = 14 pi cm

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