Explanation:

To find out how many minutes Vishwa takes to cover 1200 meters, you can use the formula:

Time = Distance / Speed

First, convert the speed from km/h to m/min:

- Speed: 20 km/h = 20000 m/60 min = 333.33 m/min

Now, calculate the time:

- Time: 1200 m / 333.33 m/min ˜ 3.6 minutes

Now consider the options:

- Option 1: 3 minutes

- Option 2: 6 minutes

- Option 3: 5 minutes

- Option 4: 8 minutes

The closest whole number is 4 minutes, but none match exactly with calculated time. However, based on realistic rounding or process errors in practical scenarios:

- Sadly, none of the available options is correct due to practical estimation variances.