A piece of ribbon is cut from a role that can now make 189 more pieces and an additional piece of 30mm. If the full role after the piece was cut is 600mm, what is the length of the ribbon that was cut?	Choose the correct choice from the following answers
A) 25
B) 270
C) 12
D) 3
E) 30
r as the length of the ribbon cut.   (189*r) +r + 30=600.   (190*r) +30=600   (190*r)=600-30 solves to (190*r)/270= 570/190   r equates to 3mm.   Answer is 3.
<result>D</result>
A piece of ribbon is cut from a role that can now make 189 more pieces and an additional piece of 30mm. If the full role after the piece was cut is 600mm, what is the length of the ribbon that was cut?