Speed = Distance / Time

Here's what each part means:

* Speed: The rate at which an object moves. It is often measured in meters per second (m/s), kilometers per hour (km/h), or miles per hour (mph).

* Distance: The total length of the path traveled by the object. It is typically measured in meters (m), kilometers (km), or miles (mi).

* Time: The duration of the movement. It is usually measured in seconds (s), minutes (min), or hours (h).

Example:

If a car travels 100 kilometers in 2 hours, its speed can be calculated as:

Speed = 100 km / 2 hours = 50 km/h

Therefore, the car's speed is 50 kilometers per hour.