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r = 7 dm
V = 22/7 * 7 * 7 * t
= 154 t
7700 = 154 t
7700/154 = t
50 dm = t
atau 500 cm
r = 7 dm
V = 22/7 * 7 * 7 * t
= 154 t
154 t = 7700
t = 7700/154
t= 50
jadi 50 dm atau 500 cm