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volumenya baca di rumus volume lingkaran
628 = 2. 22/7. r²
628 = 44/7. r²
r² = 7/44. 628
r² = 99.90 --> 100
r = 10 cm
v = 3. 4/3.πr³
= 4. 3,14. 10.10.10
= 12560 cm³