The correct answer is (a) 689 per square km.
The density of population is the number of people per unit area. It is calculated by dividing the total population by the total area. The density of population of Uttar Pradesh according to 2001 Census is 689 per square km. This means that there are 689 people living in every square kilometer of Uttar Pradesh.
The density of population is an important indicator of the level of development of a country or region. It is also used to measure the impact of human activities on the environment.
The density of population in Uttar Pradesh is high compared to other states in India. This is due to the fact that Uttar Pradesh is a large state with a large population. The high density of population in Uttar Pradesh has led to a number of problems, such as overcrowding, pollution, and lack of resources.
The government of Uttar Pradesh is taking steps to address the problems caused by the high density of population. These steps include:
- Promoting family planning
- Providing education and employment opportunities
- Developing infrastructure
- Protecting the environment