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keliling = 2 (p+l)
68 = 2(p+14)
34 = p + 14
p = 20
Luas persegi panjang = 20 x 14 = 280 cm2
=4x17
=68cm
Keliling persegi pnjang=2(p+l)
68 =2(p+14)
68=2p+28
68-28=2p
40=2p
p=40/2
p=20cm
L persegi panjang=pxl
=20x14
=280cm²