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V = 1/3 x 22/7 x 21 x 21 x 30
V = 22 x 3 x 21 x 10
V = 66 x 210
V = 13.860 cm³
= 1/3 22/7.21.21.30
= 22.21.30
= 462.30
= 13.860 cm³