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8 = 2 (5x + 3x)
8 = 2 . 8x
8 = 16x
0,5 = x
l = 3x
l = 3 . 0,5
l= 1,5 m
Keliling persegi panjang = 2(P + L)
= 2(5x + 3x)
8 = 16x
x = 8/16 = 1/2
Jadi persegi panjang tersebut mempunyai ukuran :
Panjang = 5x
= 5(1/2) m
= 2,5 m
Lebar = 3x
= 3(1/2) m
= 1,5 m