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r = d : 2
= 24 cm : 2
= 12 cm
V = 1/2 × 4/3 × π × r³
= 1/2 × 4/3 × π × 12³
= 1/2 × 4/3 × π × 1728
= 1/2 × 4 × π × 576
= 2 × π × 576
= 1152π cm³
= 1/2 x 4/3 x 3.14 x 12 cm x 12 cm x 12 cm
= 3617,28 cm³