Question

a thin wire 20cm long is formed into a rectangle , if the width of this rectangle is 4cm ,what is its length

Answer 1

I think the answer is 6 cm because it refers to the wire which now acts as the perimeter to the rectangle. the formula of perimeter of rectangle is 2*(l+b)
therefore 2*(4+6)=2*10)=20

Answer 2

Length of the wire =perimeter
of the rectangle
=20cm
Since perimeter of a rectangle=2(l+b)
20 =2(x+4)
20 =2x+8
20-8 = 2x
x =12/2
=6