Correction for the weight of a Basketball
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How heavy is 39.6893323750 monme (匁)?
It's about one-fourth as heavy as a Basketball
The weight of a Basketball is about 166.317202330 monme (匁).
(NBA official ball standards, Size 7)
A regulation NBA basketball, manufactured by Spalding, is known as a Size 7 ball and weighs 166.317202330 monme (匁). These balls have 4,118 pebbles each with a diameter of 2.5 mm