Question 1014333: What is area of a table tennis ball
What is the circumference of table tennis ball
Thanks
Answer by rothauserc(4718)   (Show Source):
You can put this solution on YOUR website! The diameter of a table tennis ball is ideally set at 40mm(40 millimeters), an actual table tennis ball is allowed to deviate from this ideal diameter by + or - .5mm. For your problem, I am just using 40mm.
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a) surface area of sphere (table tennis ball) is calculated by:
surface area(SA) = 4 * pi * r^2, where pi = 22/7, r is the radius
note our radius = 40 / 2 = 20mm
SA = 4 * (22/7) * 20^2
SA = 5028.571428571 approx 5028.57mm
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b) circumference(C) = pi * D where pi = 22/7 and D is the diameter
C = (22/7) * 40
c = 125.714285714 approx 125.71mm
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