A typical beach ball is about a quarter of a meter in radius. They are not all exactly the same size, so this answer is not precise.
10 inches
Volume of the beach ball: 4/3*pi*radius^3
The uncertainty in radius is approx 5.95%.
Volume in cubic cm = 4/3*pi*radius cubed
The radius is about 5 meters.
The radius of a circle is half of its diameter. If you are referring to a circle with a diameter of 90 meters, then the radius would be 45 meters. If 90 meters is already specified as the radius, then the radius is simply 90 meters.
Diameter = 2 x radius = 9 meters
Divide the diameter by 2 to get the radius. Then use the formula for the volume of a sphere.
The Times Square Ball, which drops on New Year's Eve in New York City, has a diameter of 12 feet (approximately 3.66 meters). This means its radius is 6 feet (about 1.83 meters). The ball is adorned with 2,688 crystals and illuminated by 32,256 LED lights, making it a vibrant centerpiece for the New Year's celebration.
If the radius is 42 meters, then you already know the radius.
1 meter
The radius is 4 meters.