An archery target with a radius of 60 cm has 7 scoring zones by concentric circles. the radius of the center black circle is 10 cm . if an arrow hits the target at a random. point, what is the probability that it hits the center black zone?

An archery target with a radius of 60 cm has 7 scoring zones by concentric circles. the radius of the center black circle is 10 cm . if an arrow hits the target at a random. point, what is the probability that it hits the center black zone?