Question

A wire is in the shape of a square whose each side is 80m.If the same wire is rebent in the shape of rectangle,whose length is 120m,find the area of rectangle?


ANSWER IS 4800m2 BUT I WANT TO KNOW THE ANSWER WITH SOLUTION.

Answer 1

perimeter are same for square and rectangle

4×80=2(120+b)
160-120=b
b=40

area=40*120=4800 m^2

Answer 2

Perimeter of the square=4×80
=32
Perimeter of the square =Perimeter of the rect
32=2 (l+b)
32=2 (120+b)
32=240+2b
2b=240-32
2b=208
B=104
Area=12480m2