Question

The population of a city increases by 10% in every 5 years. If the population of the city in the year 1990 is 1,34,310. What was the population in the year 1980?
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Answer 1

Answer:

your answer............

Answer 2

Answer

Correct option is

D

2,50,000

Let the population before two years ago be x

Given the population increases by 10%

So increase in population after one year is

100

10

×x=0.1x

So population after one year is x+0.1x=1.1x

Increase in population after another one year is

100

10

×1.1x=0.11x

So population at present is 1.1x+0.11x=1.21x

But given population at present is 3,02,500

⟹1.21x=302500

⟹x=

1.21

302500

=2,50,000

Population of city 10 years ago is 2,50,000

hope it helps you ✌️✅✅✅