Discussion
The following is the information about area of states and population :
| State | A | B | C | D |
| Area (in square km.) | 80,000 | 50,000 | 10,000 | 5,000 |
| Population (in lakh) | 16 | 10 | 4 | 3 |
Which is the most thickly populated state ?
Answer: D
The most thickly populated state is D.
Population density is population divided by area. One lakh is 100,000:
\[ \begin{aligned} A &: 1{,}600{,}000 / 80{,}000 = 20 \\ B &: 1{,}000{,}000 / 50{,}000 = 20 \\ C &: 400{,}000 / 10{,}000 = 40 \\ D &: 300{,}000 / 5{,}000 = 60 \end{aligned} \]
D has 60 persons per square km, the highest. A has the largest population but also by far the largest area, so it is as thinly populated as B at 20 per square km, and C is in the middle at 40.
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