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Length=2×breadth.
Periemeter=2(length+breadth)
122/5 =2×3×breadth.
Breadth=122/5×2×3
=4.07 m(approx).
Leangth=2×4.07=8.14 m (approx).
Area of rectangle= l×b
=4.07×8.14
=33.1298 m^2 (approx).