Correction for the size of a Golf Ball
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How big is 0.26646155440 fifths?
It's about five times as big as a Golf Ball
The size of a Golf Ball is about 0.05373837 fifths.
(per R&A-USGA Rules of Golf)
According to the Rules of Golf (as approved by the United States Golf Association and the Rules Committee of the Royal and Ancient Golf Club of Saint Andrews), a golf ball must have a volume of at least 0.053737879 fifths. Golf balls are not required to have the familiar dimpled pattern, but the design has been popular since its invention in 1905 because it reduces drag while increasing lift.