Question 1: How many willows and poplars should be prepared by planting a willow every 6 meters on the levee around the reservoir at 6060 meters and then planting a poplar every 2 meters between two adjacent willows?

Willow =6060/6= 10 10 should be prepared.

Poplar =10/0 * (6/2-1) =10/kloc-0 * (3-1) =10/kloc-

Question 2: The two trees are 60 meters apart. After adding 9 trees to the same distance in China, what is the distance between the 6th tree and 1 tree?

After adding 9 trees, the distance between two adjacent trees is 60/(2+9-1) = 60/10 = 6m.

The distance from the 6th tree to the 1 tree is (6- 1) * 6 = 5 * 6 = 30m.