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L=1/2 (12x16) = 96 cm2
LP = (2x LA) + L sisi tegak
392 = (2x96) + L sisis tegak
Luas sisis tegak = 392-192=200
200/4= 50
50=10t
t=5cm
V= luas alas x tinggi
V= 96x5 = 480cm3(A)