If the area of a rectangle is (6ab2 + 4a2b) cm2 and the length of one side is 2bcm, its perimeter is______ cm．

(6ab2 + 4a2b) △ 2Ab = 3B + 2a, 2 × (2Ab + 3B + 2a) = 4AB + 4A + 6B

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