Question

If the circumference of a circle is 308mm, find the area of the circle.

Answer 1

$2\pi \times r = 308 \\ 22 \div 7 \times r = 154 \\ 154 \times 7 \div 22 = r \\ r = 49 \\ \\ area = \pi \times r ^{2} \\ 22 \div 7 \times 49 ^{2} \\ 22 \div 7 \times 2401 \\ 22 \times 343 \\ 7546 {cm}^{2}$
here is is solution.....

Answer 2

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