If the area of a circle is 78.5 cm squared, what is the radius of the circle? Use 3.14 for pi

A. 25 cm

B. 5 cm

C. 74.86 cm

D. 7 cm

1 answer

C. 74.86 cm

To find the radius of a circle when given the area, use the formula:

Area of a circle = πr^2

78.5 = 3.14r^2
r^2 = 78.5 /3.14
r^2 = 25
r = √25
r = 5

Therefore, the radius of the circle is 5 cm.
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