Question

The circumference of a circle is 220. Find its radius and its area. (It = 3.14)
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Answer 1

Given :

The circumference of a circle =220 unit

To find :

Radius of circle and Area of circle

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Step by step explanation:

Circumference of circle =2πr

$= > 2 \times \frac{22}{7} \times r = 220$

$= > r \times \frac{44}{7} = 220$

$= > r = 220 \times \frac{7}{44}$

$= > r = 5 \times 7 = 35$

Therefore,radius is $\bold{\red{35 \:unit}}$

$= > area \: of \: circle = \pi {r}^{2}$

$= \frac{22}{7} \times {(35)}^{2}$

$= \frac{22}{7} \times 1225$

$\bold{= 175 \times 22 = 3850 {unit}^{2} }$

When take π=3.14

$\bold{= > 3.14 \times 1225 = 3846.25 {unit}^{2}}$

More about circle :

• A circle has infinite radius and diameter
• The longest chord of a circle is diameter
• If radius are equal then the circles said to be congruent