Calculate Runner Speed in km/h
The question asks for the speed of a runner in kilometers per hour (km/h). We are given the distance covered and the time taken.
Given Information
- Distance = 7.2 km
- Time = 48 minutes
Speed Calculation Steps
-
Convert the time from minutes to hours. Since there are 60 minutes in an hour, we divide the time in minutes by 60.
$ \text{Time in hours} = \frac{48 \text{ minutes}}{60 \text{ minutes/hour}} = \frac{48}{60} \text{ h} $Simplifying the fraction:
$ \text{Time in hours} = \frac{4}{5} \text{ h} = 0.8 \text{ h} $ -
Use the formula for speed: Speed = Distance / Time.
$ \text{Speed} = \frac{\text{Distance}}{\text{Time}} $ -
Substitute the given distance and the calculated time in hours into the formula.
$ \text{Speed} = \frac{7.2 \text{ km}}{0.8 \text{ h}} $ -
Calculate the final speed.
$ \text{Speed} = 9 \text{ km/h} $
Result
The runner's speed is 9 km/h.
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