MATH214
posted by Rebecca .
A tennis ball can in the shape of a cylinder holds three tennis balls snugly. If the radius of a tennis ball is 3.5 cm, what percentage of the tennis ball can is occupied by air?

volume tennis ball can= PIr^2*3r
volume of tennis balls=4/3 PI r^3
divide the second by the first. 
2.3cm^3

.022508352%
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