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P= 360 cm
Ancho: x
Largo: 3x
2(A)+2(L)= P
2x+2(3x)= 360
2x+6x= 360
8x= 360
x= 360/8
x= 45
Ancho: x= 45 cm
Largo: 3x= 3(45)= 135 cm
Área= L×A
A= 135×45
A= 6075 cm²
R. El área del rectángulo es 6075 cm²