14 lamp posts are placed along a road at equal distances. The distance between the fourth and the twelfth lamp post is 80 m.
- What is the distance between 2 lamp posts?
- What is the distance between the first and the last lamp post?
(a)
Number of intervals between the fourth and the twelfth lamp post
= 12 - 4
= 8
Distance between 2 lamp posts
= 80 ÷ 8
= 10 m
(b)
Number of intervals between first and the last lamp post
= 14 - 1
= 13
Distance between the first and the last lamp post
= 13 x 10
= 130 m
Answer(s): (a) 8 m; (b) 130 m