25 telegraph posts are spaced equally along the side of a road. If there is 85 m between each pair of posts,how many is that stretch of road in metres

Question

Any one simplify this question please

Answer 1

if there are 2 posts, there is 1 group of 85 m

if there are 3 posts, there are 2 groups of 85 m

if there are 4 posts, there are 3 groups of 85 m

if there are 25 posts there are 24 groups of 85 m

24*85=2040 m