Calculate the population density of Nigeria, having a total population of 180 million with a total land area of 923,768 sq km?

Analyze the question: Population density measures how many people live in each unit of land area. You are given the total population and the total land area.

Concept:

Population density = Total population ÷ Total land area

Solution:

• Total population = 180,000,000
• Land area = 923,768 sq km

Population density = 180,000,000 ÷ 923,768

Estimate it: 923,768 is roughly 0.92 million, so 180 ÷ 0.923768 ≈ 194.85

Check: 923,768 × 195 = 180,134,760, which is very close to 180,000,000. So the answer is about 195 people per sq km.

Checking the other options:

• A: 195 million per sq km is impossible, since the units are wrong.
• B: 5132 is what you get if you wrongly invert or mis-scale the division.
• D: 1.7 million is far too large.

Answer: Option C, 195 people per sq km.

Tip: In density questions, round the numbers first (180 million ÷ about 0.92 million) to get a quick estimate. Always check that the units are "people per sq km", which eliminates options like A and D right away.