Question

find the radius and circumference of a circle whose area is 186.34 m square

Answer 1

Answer :



Given area of Circle = 186.34 sq. metres

As we know that Area of Circle =

$\pi \times {radius}^{2} \\ \\ therefore \: \\ \\ = > \: \pi \times {r}^{2} = 186.34 \\ \\ = > \: \frac{22}{7} \times {r}^{2} = 186.34 \\ \\ = > \: {22r}^{2} = 1304.88 \\ \\ = > \: 22r {}^{2} = \frac{65219}{50} \\ \\ = > \: r = \sqrt{ \frac{65219}{50} } \\ \\ = > \: r \: = \frac{77}{10} = 7.7 \\ \\ = > circumference \: = 2\pi \times r \\ \\ = > \: 2 \times \frac{22}{7} \times 7.7 \\ \\ = > 22 \times \frac{11}{5} \\ \\ = > \: \frac{242}{5} = 48.4$


Circumference = 48.4 m

Answer 2

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