Answer :
Assuming the value of the first piece is x, then the equation would be this:
x+3x+6x=200
Simplify, and you get:
10x=200
Solve for x:
x=20
So the first piece(x) was 20 cm long
The second piece(3x) was 60 cm long
The third piece(6x) was 120 cm long
x+3x+6x=200
Simplify, and you get:
10x=200
Solve for x:
x=20
So the first piece(x) was 20 cm long
The second piece(3x) was 60 cm long
The third piece(6x) was 120 cm long