[填空题]
Landmarks are placed along the road from London to Edinburgh and the distance kn12lgrtc3; v bengl 3 12cv;tkr y2vud7/w ry:otween each landmark is 16.1 km. The first milestone placed on the road is 124.y/y2rvou7 : wd7 km from London, and the last milestone is near Edinburgh. The length of the road from London to Edinburgh is 667.1 km.
1.Find the distance between the fifth milestone and London.
$u_5$= .
2.Determine how many milestones there are along the road.
Hence there are milestones along the road.
