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14 = 56
p = 4/14 x 56 = 16 cm
l = 3/14 x 56 = 12 cm
L = p x l
= 16 x 12
= 192 Cm persegi
Maaf kalau salah
p:l=4:3
56:l=4:3
56 l
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4 3
168=4l
l=168:4
=42
Luas=pxl
l=56x42
l=2 352cm2