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 three years ago?​

Answer 1

Answer:

Let's Assume, population of the city before 3 years was 100.

Let's Assume, population of the city before 3 years was 100.after 1 year population= 108

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

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

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

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

Let's Assume, population of the city before 3 years was 100.after 1 year population= 108after 2years population= 108+(108×8/100)= 116.64after 3 years population=116.64+(116.64×8/100)=125.9712Now, let's compare with original population:125.9712 from 100then, 1,96,830 from (?)

Let's Assume, population of the city before 3 years was 100.after 1 year population= 108after 2years population= 108+(108×8/100)= 116.64after 3 years population=116.64+(116.64×8/100)=125.9712Now, let's compare with original population:125.9712 from 100then, 1,96,830 from (?)population before 3 years= 196830×100/125.9712

Let's Assume, population of the city before 3 years was 100.after 1 year population= 108after 2years population= 108+(108×8/100)= 116.64after 3 years population=116.64+(116.64×8/100)=125.9712Now, let's compare with original population:125.9712 from 100then, 1,96,830 from (?)population before 3 years= 196830×100/125.9712=1,56,250.

Let's Assume, population of the city before 3 years was 100.after 1 year population= 108after 2years population= 108+(108×8/100)= 116.64after 3 years population=116.64+(116.64×8/100)=125.9712Now, let's compare with original population:125.9712 from 100then, 1,96,830 from (?)population before 3 years= 196830×100/125.9712=1,56,250.Hope this helps :)