13 lamp posts are placed along a road at equal distances. The distance between the third and the twelfth lamp post is 72 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 third and the twelfth lamp post
= 12 - 3
= 9
Distance between 2 lamp posts
= 72 ÷ 9
= 8 m
(b)
Number of intervals between first and the last lamp post
= 13 - 1
= 12
Distance between the first and the last lamp post
= 12 x 8
= 96 m
Answer(s): (a) 9 m; (b) 96 m