A vehicle averages 68 km/h. How many kilometres can the car travel in 3 hours?
The correct answer and explanation is:
Correct Answer: 204 kilometres
To find how many kilometres a vehicle can travel in a certain amount of time, you use the formula:
Distance = Speed × Time
In this case:
- Speed = 68 kilometres per hour
- Time = 3 hours
Now multiply the speed by the time:
Distance = 68 km/h × 3 h = 204 km
So, the vehicle can travel 204 kilometres in 3 hours at a constant speed of 68 kilometres per hour.
This calculation is based on a simple principle in motion: if an object moves at a consistent speed, the distance it covers increases linearly with time. That means the longer it moves, the farther it travels, provided the speed stays the same. In this question, the speed is given as a constant 68 kilometres per hour, meaning the vehicle covers 68 kilometres every single hour.
After one hour, the car travels 68 kilometres. After two hours, it has travelled 68 kilometres twice, which is 136 kilometres. After three hours, it travels another 68 kilometres, bringing the total to 204 kilometres. Each hour adds another 68 kilometres to the total distance.
This problem assumes that the vehicle’s speed does not change during the entire period of travel. No stops, slowdowns, or increases in speed are taken into account. If the speed were to change, then the calculation would become more complex and would require using average speed or integrating over different speeds.
This kind of question is typical in basic physics or mathematics to help understand the relationship between distance, speed, and time. It also has real-life applications in planning travel, estimating arrival times, and managing fuel usage, especially in transportation and logistics.