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Sagot :
Answer:
333.3 meters per minute
Step-by-step explanation:
The best way to solve this problem is using dimensional anaysis. First, we write out our starting units, that being 20km/1hr. We have to keep in mind that we want to change the kilometers to meters and the hours to minutes.
[tex]\frac{20km}{1hr}[/tex]
We know that there are 1000 meters in 1 kilometer. We add this to the dimensional analysis as 1000m/1km. We write it as this because we want the kilometers to cancel each other out. We only want the meters.
[tex]= \frac{20km}{1hr} *\frac{1000m}{1km} ...[/tex]
We also know that 1 hour is 60 minutes. We add this to the analysis as well so that the hours cancel each other.
[tex]= \frac{20km}{1hr} *\frac{1000m}{1km} * \frac{1hr}{60min}[/tex]
We now solve this expression. Since both the kilometers and the hours cancel out, we have meters per minute as our unit. All that's left are the numbers.
= (20*1000*1)/(1*1*60) m/min
= 333.3 meters per minute
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