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in 201520152015 the populations of city x and city y were equal. from 201020102010 to 201520152015, the population of city x increased by 20\ , percent and the population of city y decreased by 10\, percent. if the population of city x was 120{,}000120,000120, comma, 000 in 201020102010, what was the population of city y in 201020102010?



Answer :

Answer:

Step-by-step explanation:

Answer:

The exact Population of the city Y in 2010 was 160,000.

Step-by-step explanation:

Given that,

1. In the year 2015, the populations of City X and City Y were equal.

2. City X population is increased by 20% and City Y population is decreased by 10% from 2010 to 2015.

3. Also, the population of City X was 120,000 in 2010

With the given data, calculation goes like this,

The population of City X in 2010 is 120000

Population Increased by 20% till 2015,

                = 120000×120/100

                = 144000

As Population of city Xand Y are same,

Population of city Y in 2015 would be 144000.

Population of Y in 2010 was decreased by 10%,

                = 144000×100/90

                =160000

Therefore, the Population of city Y in 2010 was 160,000.

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