1. The problem is to find the length in feet of a line that is separated into two parts by a dotted line. 2. To solve this, we need to know the total length of the line and the position of the dotted line that separates it. 3. If the total length is $L$ feet and the dotted line divides it into two parts, then the sum of the lengths of the two parts equals $L$. 4. Without specific numerical values or additional information, we cannot calculate the exact lengths. 5. Please provide the total length or the lengths of the parts to proceed with the calculation.