**Calculation of Speed in Different Units**

To calculate the speed of the scooterist, we need to first determine the distance covered and the time taken. Given that the distance covered is 3 kilometers and the time taken is 5 minutes, we can proceed with the calculations.

1. **Speed in Centimeters per Second:**
- First, we convert the distance from kilometers to centimeters. Since 1 kilometer is equal to 100,000 centimeters, the distance covered in centimeters would be 3 x 100,000 = 300,000 centimeters.
- Next, we convert the time from minutes to seconds. Since 1 minute is equal to 60 seconds, the time taken in seconds would be 5 x 60 = 300 seconds.
- Now, we can calculate the speed by dividing the distance covered in centimeters by the time taken in seconds: Speed = Distance / Time = 300,000 cm / 300 s = 1000 cm/s.

2. **Speed in Meters per Second:**
- The distance covered is already given in kilometers, so we don't need to convert it.
- We convert the time from minutes to seconds as done previously: 5 x 60 = 300 seconds.
- Now, we can calculate the speed by dividing the distance covered in meters by the time taken in seconds: Speed = Distance / Time = 3 km / 300 s = 0.01 km/s.
- To convert kilometers per second to meters per second, we multiply by 1000: Speed = 0.01 km/s x 1000 = 10 m/s.

3. **Speed in Kilometers per Hour:**
- The distance covered is already given in kilometers.
- To convert the time from minutes to hours, we divide by 60: 5 minutes / 60 = 0.0833 hours.
- Now, we can calculate the speed by dividing the distance covered in kilometers by the time taken in hours: Speed = Distance / Time = 3 km / 0.0833 h ≈ 36 km/h.

**Explanation:**
- Speed is a measure of how fast an object is moving. It is calculated by dividing the distance traveled by the time taken.
- In this case, the speed of the scooterist was calculated in three different units: centimeters per second, meters per second, and kilometers per hour.
- To convert between different units, we used appropriate conversion factors. For example, to convert kilometers to centimeters, we multiplied by 100,000 since there are 100,000 centimeters in one kilometer.
- Similarly, to convert minutes to seconds, we multiplied by 60 since there are 60 seconds in one minute.
- The final results of the calculations were:
- Speed in centimeters per second: 1000 cm/s
- Speed in meters per second: 10 m/s
- Speed in kilometers per hour: 36 km/h

A-1000centimetre per second b-10m/s c-0.001km/hr