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volum = ( 1/2 bola ) + ( volum krucut)
= ( 1/2 x 4/3 x π x r³) + ( 1/3 x π r x t)
= ( 2/3 x 3,14 x 2x 2x 2) + ( 1/3 x 3,14 x 2x 2)
= ( 2/3 x 3,14 x 8) + ( 1/3 x 3,14 x 4)
= 16,74 + 4,18
= 20,9 cm³
= 21 cm³