1. The problem is to understand the formula for speed. 2. Speed is defined as the distance travelled divided by the time taken. 3. Mathematically, this is expressed as: $$\text{speed} = \frac{\text{distance travelled}}{\text{time}}$$ 4. This formula means that if you know how far an object has moved and how long it took, you can calculate its speed by dividing the distance by the time. 5. For example, if a car travels 100 meters in 5 seconds, its speed is: $$\frac{100}{5} = 20$$ 6. So, the speed is 20 units of distance per unit of time (e.g., meters per second).