3. (8 points) Two ropes of the same length, the first one is evenly cut into 4 segments, the second one is evenly cut into 6 segments. It is known that the length of each segment from the first rope differs from the length of each segment from the second rope by 2 meters. Therefore, the total length of the original two ropes is ( ) meters.
A. 12
B. 24
C. 36
D. 48
【Answer】Solution: The length of the second rope is:
$$
\begin{aligned}
& (2 \times 4) \div(6-4) \times 6 \\
= & 8 \div 2 \times 6 \\
= & 4 \times 6 \\
= & 24 \text { (meters) }
\end{aligned}
$$

The original total length of the two ropes is:
$$
24 \times 2=48 \text { (meters) }
$$

Answer: The original total length of the two ropes is 48 meters. Therefore, the correct choice is: $D$.