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x= 450÷18
x=25
p= 175
l= 50
L = pl= 175.50=8750m^2
K = 45
P:l = 7:2
Rumus keliling persegi panjang
K= 2(p+l)
450 = 2(7x+2x)
450 = 2*9x
450 = 18x
X = 450:18
X = 25
Panjang = 7x = 7*25 = 175
Lebar = 2x = 2*25 = 5 Luas = 175*50=8750