Question

If the area of a cirle is 78.5 cm2, find its circumference (take pie = 3.14)

Answer 1

Answer:

according to question :-

area = 78.5

πr^2 = 78.5

3.14 * r^2 = 78.5

r^2 = 78.5 / 3.14 = 25

r^2 = 25

r = √25

r = 5

now

circumference = 2πr = 2*3.14*5 = 31.4

so circumference = 31.4 cm

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