Answer :

Length of rectangle




……(I)


Breadth of the rectangle =


……(II)


Equating Eq. I and II and change sign of Eq. II




Substituting y=8 in Eq.I






Length =


Breadth =


Area = Length × breadth = 40× 16 = 640 sq. unit


Perimeter = 2(Length + Breadth) = 2(40+16) = 2(56) =112 unit.


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