The following bar graph represents the population of a city (in lakhs) as per the census across different years.

What is the per cent increase in population from 1951 to 2001?

The correct option is 144%.

Based on the provided bar graph showing the population of a city (in lakhs) across different census years:

Step 1: Extract data from the graph

• Population in 1951 = 25 lakhs
• Population in 2001 = 61 lakhs

Step 2: Calculate the increase in population

$\text{Increase in population}=61-25=36\text{ lakhs}$

Step 3: Calculate the percentage increase from 1951 to 2001

$\text{Percentage Increase}=\left(\frac{\text{Increase in Population}}{\text{Population in 1951}}\right)\times 100$

$\text{Percentage Increase}=\left(\frac{36}{25}\right)\times 100$

$\text{Percentage Increase}=36\times 4=144\%$

Thus, the per cent increase in population from 1951 to 2001 is 144%.