1. **Problem:** A car travels 780 kilometers in 12 hours. Find the speed of the car. 2. **Formula:** Speed is calculated by dividing distance by time: $$\text{Speed} = \frac{\text{Distance}}{\text{Time}}$$ 3. **Calculation:** Substitute the given values: $$\text{Speed} = \frac{780}{12}$$ 4. **Simplify:** $$\text{Speed} = \frac{\cancel{780}}{\cancel{12}} = 65$$ 5. **Answer:** The car travels at a speed of 65 kilometers per hour. This means the car covers 65 kilometers every hour on average.