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V1=⅓×22/7×10,5²×21
V1=110,25 × 22
V1=2425,5 cm³
V2=⅓πr²t
V2=⅓×22/7×14²×21
V2=196 × 22
V2=4312 cm³
a).
V1:V2=2425,5:4312
V1:V2=110,25 : 196
b). Selisih=4312-2425,5=1886,5 cm³