Question

the annual rate of growth in population of a certain city is 8%. If its present population is 1,96,830 what was the population 3 years ago?

Answer 1

Let's Assume, population of the city before 3 years was 100.
after 1 year population= 108
after 2years population= 108+(108×8/100)= 116.64
after 3 years population=116.64+(116.64×8/100)=125.9712

Now, let's compare with original population:

125.9712 from 100
then, 1,96,830 from (?)

population before 3 years= 196830×100/125.9712
=1,56,250.

Hope this helps :)

Answer 2

Answer

There's your answer...............