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A size 7 Basketball has a radius of 4,77 inches (12.1158 cm).
The volume of a sphere is:
V= (4/3) πr3
So (12.1158)3x 3.14159 x (4/3) = 7449.5853 cm3.
Gold has a density of 19,3 g/cm3, so that is 7449.5853x19.3=143777g so a solid gold basket ball will weigh 143 kilo's and 777 grams
In American measures around 316 lb
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