Question 301848
this has been answered so im posting it for you incase you didnt see it.


Let the midle-sized piece have length "x".
Longest piece has length "3x".
Shortes piece has length "x-5".
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Equation:
x + 3x + x-5 = 40
5x = 45
x = 9 cm (middle)
3x = 27 cm (largest)
x-5 = 4 cm (smallest)