Question

find the area of circumference is 52.8m?​

Answer 1

Answer:

Circumference of a circle = 52.8 cm

Circumference formula = 2πr

so,

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2 \times \pi \: \times r = 52.8 \\ \\ 2 \times \frac{22}{7} \times r = 52.8 \\ \\ r = \frac{528 \times 7}{10 \times 22 \times 2} \\ \\ r = \frac{84}{10} \\ \\ r = 8.4 \: cm

THEREFORE,

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The radius of the circle measures = 8.4 cm

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Step-by-step explanation:

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Answer 2

Answer:

50.56

Step-by-step explanation:

In a circle,

Circumference = =2πr

Hence,

$2\pi r = 52.8 \\ r = \frac{52.8}{2\pi}$

Area of a circle = πr^2

$a = \pi {r}^{2} \\ a = \pi {( \frac{52.8}{2\pi} )}^{2} \\ = \frac{52.8 \times 52.8}{4 {\pi}^{2} } \\ = \frac{52.8 \times 52.8 \times 7 \times 7}{4 \times 22 \times 22} \\ = 70.56$