Question

find areas of a circle if r=28,r=5.6cm
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Answer 1

Area of circle =pi × r^2

R=28

A=pi × 28×28=784pi=2464 sq.cm

R=5.6

A=pi×5.6×5.6=31.36pi=98.56 sq.cm

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Answer 2

The area of first circle =

$\pi {r}^{2}$

$\frac{22}{7} \times 28 \times 28$

$\frac{17248}{7}$

$2464 \: \: \: \: \: \: \: \: \: answer$

The area of seacond circle=

$\pi {r}^{2}$

$\frac{22}{7} \times 5.6 \times 5.6$

$\frac{689.92}{7}$

$98.56 \: \: \: \: \: \: \: answer$