A car travels 30 miles in 2 hours,what is its speed
The Correct Answer and Explanation is:
To calculate the speed of a car, we use the formula:
[
\text{Speed} = \frac{\text{Distance}}{\text{Time}}
]
Step-by-Step Calculation:
- Distance traveled: 30 miles
- Time taken: 2 hours
Substituting these values into the formula:
[
\text{Speed} = \frac{30 \text{ miles}}{2 \text{ hours}} = 15 \text{ miles per hour}
]
Therefore, the car’s speed is 15 miles per hour (mph).
Explanation:
Speed is a measure of how fast something is moving. It is calculated by dividing the total distance traveled by the amount of time it took to travel that distance. The formula for speed is:
[
\text{Speed} = \frac{\text{Distance}}{\text{Time}}
]
This means that if you know how far an object travels (distance) and how long it takes (time), you can determine its speed. In this problem, the car travels a total of 30 miles, and it takes 2 hours to do so.
- The unit of distance is miles, and the unit of time is hours, so the resulting unit for speed is miles per hour (mph).
- If the car travels 30 miles in 2 hours, it means that for every 1 hour of travel, the car covers 15 miles. This gives the car an average speed of 15 mph.
It’s important to note that this calculation assumes the car is traveling at a constant speed over the entire 2-hour period. If the car were accelerating or decelerating, the average speed would still be calculated using total distance and total time, but the instantaneous speed would vary during the journey.
In summary, the car’s speed is 15 miles per hour because it covers 30 miles in 2 hours, as calculated by the formula for speed.