A square is cut into two rectangles so that the sum of the lengths of the perimeters of these two rectangles is 30m

Question

what is the length of thee square in cm

 

Answer 1

Draw a square. There are four equal sides, call each "s."

Cut the square. Separate the parts. Two more sides of length "s" are created.
So 6s = 30

 

Can you solve for s?