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lebar = 3x
keliling = 2(p+l)
224 = 2(5x+3x)
224 = 2(8x)
224 = 16x
x = 224/16
x = 14
panjang = 5x = 5 x 14 = 70 meter
lebar = 3x = 3 x 14 = 42 meter
5+ 3 = 8
5/8 x 112 = 70 m
(jadikan jawaban terbaik)