Question

India’s population has been steadily increasing from 439 million in 1961 to 1028 million in 2001. Find the total increase in population from 1961 to 2001, write the increase in population in Indian system of numeration, using commas suitably.

Answer 1

Hint: First, we will find the total increase in the population then we will multiply the result with 10 lakhs to get the increase in population in Indian system of numeration because 1 million is equal to 10 lakhs.

Complete step by step solution:
Given: we have given that the population of India in 1961 was 439 million and in 2001 the population was 1028 million.
And we have to find the increase in population here.
We will subtract the population of 1961 of India as given from the population of 2001 of India as given to get the increase in population.
Increase in population $ = 1028{\text{ million}} - 439{\text{ million}}$
${\text{ = 589 million}}$
So, the increase in population is 589 million.
Now, we will multiply the obtained value with 10 lakhs to find the increase in population in Indian system of numeration.
Which is;$589 \times 10,00,000$
Which is equal to$58,90,00,000$
So, the increase in population from 1961 to 2001 was 58,90,00,000.
It can be written in words as Fifty eighty crores and ninety lakhs only.

Note: Here, we have asked about the increase in population so we have subtracted the value directly and here we have multiplied by 10 lakhs to get the value of population in Indian system of numeration. We have to be very careful while applying the comma used from the end of the number. First comma is used before 3 digits from the end and then before two digits and so on.