I accidentally put my car in the second gear and drove for like ten minutes.

What is your question?

The first five mins was on city roads so the speed was like 30 to 35 miles but then I went onto the freeway when I found I couldn't get the speed up. Then I switched back to the D gear. But the whole process, the rpm never went near to redline. It was around 5k to 6k. The redline is 7k to 8k and above.