Whereas another metro of India, Mumbai ranks seventh on the list for its population. It was ranked the 17th most populous city in the world in 1950. Therefore, it has been quite a constant growth in the population of Mumbai with years.
In fact, Mumbaikars face much less problems as compared to Delhiites. The crime rate in Mumbai is much less than Delhi. Though, due to overpopulation the problem of living area persists there as well.
Now, let's go through some of the most crowded areas in Delhi: