Area of a circle is 49πcm2. Find its circumference
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3
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.
Answered by
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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