The population of a city had increased successively at the rate of 6%, 4% and 2% per annum during last three years. If its present population is 11,24,448, then what was its population three years ago?

To find the original population before the successive increases, divide the present population by the growth factors for each year. The growth factors are 1.06, 1.04, and 1.02, so the population three years ago was 1124448 divided by (1.06 multiplied by 1.04 multiplied by 1.02). This calculation gives 1124448 divided by 1.124448, which equals 1000000.

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