A cubic foot of water weighs 62.4 lb. A basketball has a radius of 0.39 ft. About how much would the basketball weigh if it was filled with water?
Volume of the basketball =
4/3 * pi * (.39ft)^3 = about.248 ft^3
So the weight =
.248ft^3 * 62.4lbs/ft^3 = about 15.5 lbs