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V 1 : 1/3 × π × r² × t
: 1/3 × 3,14 × 8 × 8 × 28 = 5626,88 : 3 = 1875, 62667 cm³
V 2 : π × r² × t
: 3,14 × 8 × 8 × 15 = 3014,4 cm³
cuma 1 bisanya