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2.phi.r.t = 440
2.22/7.r.10 = 440
440.r = 440 . 7
440.r = 3080
r = 3080/440
r = 7 cm
maka :
V tabung
= phi.r².t
= 22/7.7².10
= 22/7.49.10
= 22.7.10
= 1540 cm kubik