Solution:
Suppose he takes minutes to count notes. We have and is an A.P. with common difference
We are given
All the notes get counted in minutes.
A person is to count currency notes. Let an denote the number of notes he counts in the nth minute. If and are in an A.P. with common difference , then the time taken by him to count all the notes is
Suppose he takes minutes to count notes. We have and is an A.P. with common difference
We are given
All the notes get counted in minutes.