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R= 5cm
Phi = 3.14
V =1/3phi r^2
3.14 = 1/3x3.14x5x5xt
3/25 =t
T^2+r^2 = s^2
3/25^2 + 5^2 = s^2
0.0144 + 25 = s^2
Akar dari 25.0144 adalah = 5.0014 dibulatkan jadi 5