Question

Find out radius and circumference if the area is 186.34

Answer 1

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Here is your answer

Area of circle = 186.34 units

As we know that,
Area = $\pi {r}^{2}$

$= \frac{22 \times {r}^{2} }{7} = 186.34 \\ \\ by \: cross \: multiplication \\ \\ {r}^{2} = \frac{18634 \times 7}{22 \times 100} \\ \\ {r}^{2} = 59.29 \\ \\ r = \sqrt{59.29} \\ r = 7.7 \: units$
Radius = 7.7 units

Now, Circumference

$= 2\pi r \\ \\ = \frac{2 \times 22 \times 77}{7 \times 10} \\ \\ = \frac{484}{10} \\ \\ = 48.4$

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