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= 3,14.10².40
=12560
3..πr²t
= 22/7.7².10
=1540
maaf hanya segini saja
= 12.560 cm³
2. V = 22/7*r²*12
16.632 = 22/7*r²*12
16.632*7/264 = r²
√441 = r²
21cm = r
3.V= 22/7*7*7*10
= 1.540 cm³
4. V = 150*20
= 3.000 cm³
5.V =3,14*5*5*t
785 = 3,14*5*5*t
785/78,5 = t
10 cm = t