Answer: The radius is 14 units.
Explanation:
Start by finding the diameter, the formula for circumference is πd, So set up an equality:
28π=c
28π=πd
Divide both sides by π:
28π/π = 28πd/π
Cross out π:
28 = d
diameters twices largest radius, divide your diameter by 2 to get radius.
D/2 = r = 28/2 = 14
Therefore, your radius is 14 units.