w = x
l = 6x
a = w*l
a = 6x*x = 486
6x^2 = 486
x^2 = 486/6
x^2 = 81
x=9 which is the width
the length will be 6*9=54
the perimeter will be 2L+2W
2*9 + 2*54
18+108
= 126 cm
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