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rbA = 3rbB
Jwab:
Volum bA : Volum bB
= 4/3rbA² : 4/3rbB²
= 4/33rbB² : 4/3rbB²
Coret: 4/3 dan rbB
= 3² : 1²
= 9 : 1
Salam..
Moga suksess ^^