Application of first order differential equation

This Paper, then gives a brief overview of First order differential equation, its formation and its how to solve it. It also explain how first order differential equation can be used to predict growth of bacteria. It also explains how it can be used by archaeological department to estimate the age of fossil. It also thrown light on application of First order differential equation by Police Department to estimate the time of death of a murdered person. In this paper, population of Haryana, a prosperous state of India is predicted by use of First Order equation.