Speed Calculation:

To find the speed of the car in centimeters per second, we need to convert the given distance and time values to the appropriate units.

1. Convert Kilometers to Centimeters:
Since 1 kilometer is equal to 100,000 centimeters, we can multiply the given distance of 4 kilometers by 100,000 to convert it to centimeters.
4 km * 100,000 cm/km = 400,000 cm

2. Convert Minutes to Seconds:
Since 1 minute is equal to 60 seconds, we need to convert the given time of 3 minutes to seconds.
3 minutes * 60 seconds/minute = 180 seconds

3. Calculate Speed:
The formula for speed is distance divided by time. In this case, the distance is 400,000 centimeters and the time is 180 seconds.
Speed = Distance/Time
Speed = 400,000 cm / 180 s = 2,222.22 cm/s

So, the speed of the car is approximately 2,222.22 centimeters per second.

Key Points:
- The given distance is 4 km.
- Convert kilometers to centimeters by multiplying by 100,000.
- The converted distance is 400,000 cm.
- The given time is 3 minutes.
- Convert minutes to seconds by multiplying by 60.
- The converted time is 180 seconds.
- Use the formula speed = distance/time.
- Divide the converted distance by the converted time to find the speed.
- The speed of the car is approximately 2,222.22 cm/s.

400000/180=2222.22