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TTr2t - 4/3 TTr3
3,14,100.20 -3140x4/3
6280-4186,6 = 2093,4
=πr²t
=3,14.10².20
=6280 cm³
Volume bola
=4/3πr³
=4/3. 3,14 .10³
=4186,67 cm³
Volume udara
=Volume tabung-Volume bola
=6280-4186,67
=2093,33 cm³