Question

if circumference of a circle is 22cm .Area of circle is​

Answer 1

Answer:

38.5 cm

Step-by-step explanation:

you have given the circumference of circle is 22 cm.

2×22/7r=22

44/7r=22

r= 22×7÷44

r= 7/2

Area of circle= 22/7×7/2×7/2

= 77/2

=38.5 cm

Answer 2

As per given information ,

Circumference of circle is 22 cm

We have to find out the perimeter of circle.

As we know that,

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

Put the given value in the formula,

22 = $2 \times \pi \times r$

$\frac{22}{2} = \pi \: r$

$11 = \pi \: r$

Put the value of π = 3.14

$11 = 3.14 \times r$

$\frac{11}{3.14} = r$

r= $3.5$

Radius (r) of a circle is 3.5 cm

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

Put the value of r

Area of circle = $\pi \times {3.5}^{2}$

The value of π is 3.14 .

Area of circle = $3.14 \times 3.5$

Area of circle = $10.99$

Hence,

Area of circle is 10.99 ${cm}^{2}$