For 3kilometers if there is white line marked which three meters long and 5 gap between the how many lines are there?

Since the length of each line is 3 meters, and there is a gap of 5 meters between each line, we can calculate the total number of lines as follows:

1. Distance covered by one line and the gap = 3 meters (line) + 5 meters (gap) = 8 meters

2. Total number of lines = Total distance / Distance covered by one line and the gap

= 3000 meters / 8 meters

= 375

Therefore, there are 375 white lines marked on the 3-kilometer stretch of road.