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2(p + l) = 38
2(5 + l + l) = 38
10 +4l = 38
l = 7 cm
p = 12 cm
L = 12 x 7 = 84 cm2
jawabannya p = 12 , l = 7
luasnya = 84 cm²
2. 240/2 = 120 5+7 = 12
jawabanya lebar : 5/12 x 120 = 50 cm