Measurement of Distances:-
In Physics distance is a numerical description of how far apart objects are. In everyday discussion, distance may refer to a physical length, or an estimation based on other criteria (e.g. “two homes”). We can say In mathematics, a distance function or metric is a generalization of the concept of physical distance. A metric is a function that behaves according to a specific set of rules, and provides a concrete way of describing what it means for elements of some space to be “close to” or “far away from” each other.
We can say In most cases, “distance from A to B” is interchangeable with “distance between B and A”.
For Example: The distance between two pegs (A) and (B) has been chained. When reaching peg (B), the back man has used 7 arrows. 23 links have been counted between the last arrow and peg (B), What is the total distance between peg (A) and peg (B)?
Data given
number of arrows used by the back man = 7
length of the chain = 20 m
number of links between the last arrow and peg (B) = 23
length of one link = 20 cm = 0.20 m
Than Answer is:-
Distance between the last arrow and peg (B) = number of links x length of one link = 23 x 0.2 = 4.6 m
Total distance = (number of used arrows x chain length) + (distance between last arrow and peg B) = (7 x 20 m) + 4.6 m = 144.6 m