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4/3phi. R^3 : 4/3phi.r^3
4/3phi 6^3 : 4/3phi 12^3
Coret 4/3 phi maka
6^3 : 12^3
6^3 : 2^3 x 6^3
Coret 6^3 maka
1 : 2^3 atau
1:8
d=8 maka r= 8:2=4 cm
d=12 maka r=12:2=6 cm
a. 4/3×3,14×4×4×4=267,94 cm3
b.4/3×3,14×6×6×6= 904,32 cm3
perbandingannya 267,92:904,32= 67:113