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Updated: 9/27/2023

Wiki User

14y ago

Circumference = π x Diameter= π x (2 x Radius)

28.5 = π x 2R

28.5 / π = 2R

28.5/3.14159 = 2R = 9.0718 OR 9.1

Radius = 9.1/2 = 4.5 inches.

Wiki User

11y ago

Wiki User

14y ago

The radius of a full adult size NBA Baseball is 4.7 inches.

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