Which of the following are in inverse proportion?
(i) The number of workers on a job and the time to complete the job.
(ii) The time taken for a journey and the distance travelled in a uniform speed.
(iii) Area of cultivated land and the crop harvested.
(iv) The time taken for a fixed journey and the speed of the vehicle.
(v) The population of a country and the area of land per person.

Explanation

To determine which of the given statements are in inverse proportion, we need to analyze each statement based on the definition of inverse proportion. Two quantities are said to be in inverse proportion if an increase in one quantity results in a decrease in the other quantity, and vice versa.

Let's evaluate each statement step by step:

### Step 1: Number of workers on a job and the time to complete the job.
- **Analysis**: If the number of workers increases, the time taken to complete the job decreases. For example, if one worker takes 5 days to complete a job, 5 workers can complete it in less time.
- **Conclusion**: Yes, they are in inverse proportion.

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