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= 45360 cm³
b) V = 625 cm² × 12 cm
= 7500 cm³
c) V = 13 × 13 × 9 cm³
= 1014 cm³
2) diagonal ruang = s√3
30 = s√3
s = 30/√3 × √3/√3
s = 30/3 √3
s = 10√3 cm
V = 10√3 × 10√3 × 10√3 cm³
= 1000 × 3√3 cm³
= 3000√3 cm³