In 1981 , the r - value for human population in India was :

Options

A. 0.0196
B. 0.0205
C. 2.71
D. 0.175

Answer

To determine the r-value for the human population in India in 1981, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the R-value**: The r-value, or intrinsic rate of natural increase, is a measure of the growth rate of a population. It is calculated as the difference between the birth rate (b) and the death rate (d) per capita.

2. **Population Growth Equation**: The population growth can be described by the equation:
\[ \frac{dN}{dt} = R \times N \]
where:
- \(\frac{dN}{dt}\) is the change in population size over time,
- \(R\) is the intrinsic rate of natural increase,
- \(N\) is the current population size.

3. **Identify the R-value for 1981**: According to the information provided, the r-value for the human population in India in 1981 is given as 0.0205.

4. **Evaluate Options**: If presented with multiple-choice options, we would compare the calculated r-value with the options provided. The options include:
- 0.0196
- 0.0205 (this is the correct answer)
- 2.71A
- 0.175A

5. **Select the Correct Answer**: The correct r-value for the human population in India in 1981 is 0.0205.

### Final Answer:
The r-value for the human population in India in 1981 was **0.0205**.

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