Nodding his head, Mu Nan said, "Oh, I see. That is not such a long distance, but it's not close either.
I assume that if life was normal and the usual traffic of the capital was considered, it would take about thirty minutes of driving during normal hours."
"Yeah. So, it's not very far, however, such a distance could be travelled even for a day if the person travelling has to avoid or fight with powerful zombies.
The distance is about forty kilometers and the sound is very clear. Let's wait for them to reach the next destination.
Record the distance and the results. We will see how the phone can be improved with this data." Yang Leo said to Mu Nan.
"Yes, teacher Yang." Mu Nan replied and started to record what Ye Xuan had reported in a book sitting on the table before them.
