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= 1/3 . 3,14 . 3² . 12
= 3,14 . 3 . 12
= 113,04 cm³
Vb = 4/3.πr³
= 4/3 . 3,14 . 3³
= 4 . 3,14 . 9
= 113,04
Vbandul = Vk + Vb
= 113,04 + 113,04 = 226,08 cm³
karena setiap 1 cm³ = 8 gram
maka massa bandul = 226,08 x 8 = 1808,64 gram