Correction for the size of a Bowling Ball (packed)
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How big is 418 cubic yards?
It's about 40,000 times as big as a Bowling Ball (packed)
The size of a Bowling Ball (packed) is about 0.010768815173 cubic yards.
(64% packing density) (USBC specifications; tenpin)
According to United States Bowling Congress specifications, a tenpin bowling ball should measure at least 10.795 cm (4.25 in) in radius for a total volume of about 0.0068920417109 cubic yards. Because regulation balls measure the same diameter irrespective of their weight, ball density varies by size and balls weighing less than about 5 kg (11 lbs) will float in water.