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v=4/3πr³=4/3π×100³=1 333 333⅓πcm³
pole=4πr²=4π×100²=40 000πcm²
P=4π100²
P=4π10000
P=40000π
V=4/3πr³
V=4/3π100³
V=4/3π1000000
V=4000000÷3π
V=1333333,3π