Speed 153 km per hour. What is the speed meter per minute?
The correct answer and explanation is:
To convert the speed from kilometers per hour (km/h) to meters per minute (m/min), follow these steps:
- Start with the speed given: 153 km/h.
- Convert kilometers to meters. Since 1 kilometer equals 1,000 meters, multiply 153 by 1,000:
153 km/h = 153 × 1,000 = 153,000 meters per hour. - Convert hours to minutes. Since 1 hour equals 60 minutes, divide the number of meters per hour by 60:
153,000 meters/hour ÷ 60 = 2,550 meters per minute.
Therefore, the speed in meters per minute is 2,550 m/min.
Explanation
Speed measures how far an object travels in a given amount of time. In this problem, speed is initially expressed in kilometers per hour, meaning the object travels 153 kilometers every hour. To understand the speed in meters per minute, it is necessary to convert both the distance unit and the time unit.
First, converting kilometers to meters changes the distance unit from larger to smaller, which helps when dealing with measurements in meters. Since 1 kilometer equals 1,000 meters, multiplying the speed in kilometers by 1,000 gives the speed in meters per hour.
Second, converting hours to minutes changes the time unit from larger to smaller. There are 60 minutes in an hour, so dividing the speed in meters per hour by 60 gives the speed in meters per minute.
This method of unit conversion is common in physics and everyday life to express measurements in units that are easier to understand or more practical for the situation. For example, meters per minute can be more meaningful when measuring shorter time intervals.
In summary, by multiplying the speed by 1,000 to convert kilometers to meters, then dividing by 60 to convert hours to minutes, the speed in meters per minute is obtained as 2,550 m/min.