Question 371240
let shorter piece be x 
longer one will be 2x+15
..
2x+15 +x=120 cm
3x+15=120
-15   -15
3x=105
/3
x= 35 cm
the other will be 2x+15 
= 2*35+15
=85 cm
..
m.ananth@hotmail.ca