Question

length of circumference of a circle is 22cm then find the area of a circle

Answer 1

2πr=22
2×22/7×r=22
r=7/2
area=πr^2
22/7×7/2×7/2
22×7/4
77/2
38.5

Answer 2

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$2\pi \: r = 22cm$



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



$r = \frac{22}{ \frac{44}{7} }$


$r = \frac{7}{2} cm$




Now , Area of the circle is


$\pi \: r {}^{2}$


$\frac{22}{7} \times \frac{49}{4}$



$\frac{77}{2} = 38.5cm {}^{2}$




Hope it helps you


$<marquee > prabhudutt$