Verified Answer :

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Area of a rectangle is 27 cm²

Given:
Perimeter of a rectangle = 24 cm
Length = 3x
Width = x

p = 2(l + w)
24 = 2(3x + x)
24 = 6x + 2x
24 = 8x
24/8 = x
3 = x 

Width = 3 cm ; Length = 3x = 3(3) = 9 cm

Area = length width
         = 9cm 3 cm
Area = 27 cm² 

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