The students planted trees on one side of the road, first planting 1 tree, and then planting one every 5 meters. Eight trees have been planted. 1 What's the distance between the tree and the eighth tree?

On both sides of the 30-meter-long corridor, put a pot of flowers every 5 meters. This * * *, how many pots of flowers do you need?

2. On one side of an avenue, erect a telephone pole every15m from beginning to end, and use 5 1 pole. What is the total length of this avenue?