Question

The area
of a
circle is
38.5cm?
of
Find the circumference of the circle ​

Answer 1

Step-by-step explanation:

c=22

Area 38.5

A=πr2

c=2πr

c=2√πA=2.√π.38.5=21.99557

Answer 2

As per given information ,

Area of circle is 38.5${cm}^{2}$

We have to find out the perimeter of circle.

As we know that,

Area of circle $= \pi {r}^{2}$

Put the given values in the formula we get

$38 .5 = \pi {r}^{2}$

$\frac{38.5}{\pi} = {r}^{2}$

The value of π is 3.14 .

$\frac{38.5}{3.14} = {r}^{2}$

${r}^{2} = 12.26$

When square is shift from left to right side it becomes square root.

$r = \sqrt{12.26}$

The square root of 12.26 is 3.5 .

r = $3.5$

Radius = r = 3.5 cm

Circumference of circle = $2 \times \pi \times r$

Put the value of r ,

Circumference of circle = $2 \times \pi \times 3.5$

Circumference of circle = $7 \times \pi$

Put the value of π = 3.14

Circumference of circle = $7 \times 3.14$

Circumference of circle = $21.98$

Hence,

Circumference of circle is 21.98 cm.