Question

The circumference of a circle is 31.4 cm.Find the radius and the area of a circle

Answer 1

31.4 cm = 2*pi*r

31.4 cm = 2*(22/7)*r

r = (31.4*7)/(2*22)

r = 5 cm

Area = pi*radius^2 = (22/7)*5^2 =78.539 cm^2.

Answer is 5cm.

Answer 2

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