sebuah bola mempunyai panjang jari-jari 10 cm dan phi = 3,14. Volume bola tersebut adalah...
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· Tabung
V = π x r² x t
V = 22/7 x 7 x 7 x 10
V = 22 x 7 x 10
V = 154 x 10
V = 1.540 cm³
· Bola
V = 4/3 x π x r³
V = 4/3 x 3,14 x 10 x 10 x 10
V = 4/3 x 31,4 x 10 x 10
V = 4/3 x 314 x 10
V = 4/3 x 3.140
V = 12.560/3
V = 4.186,6 cm³
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