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Volume limas = 1/3 x luas alas x tinggi
144 = 1/3 x luas alas x 12
144 / 12 = 1/3 x luas alas
12 x 3 = luas alas
luas alas = 36 cm2
b)
Alas limas tersebut adalah persegi
Luas alas = s^2
36 = s^2
√36 = s
s = 6 cm