Answer:
Dimensions:
x = 130 cm
y = 10 cm
Step-by-step explanation:
Let´s call "x" and "d" sides of the cardboard rectangle x > y
then we have to cut along x three pieces of y length to get three squares of sides "y".
We have two squares of side y, the third one we cut in half and get two rectangles with sides y and y/2, we cut to get 4 squares with sides y/2 then so far we have
2 large squares ( side y )
4 medium squares (side y/2) we just need three
We need to cut the available square side y/2 in 4 to get y/4 squares
Finally, we need y/4 length to get the fifth y/4 square
Then dimensions of the cardboard
x and y
We cut 3 times at "y" length and need additional 10 cm
Then the side y/4 is equal to 10 cm then y = 40 cm
and x = 3*y + y/4
x = 3*40 + 10 = 130 cm