Answer:
C. 10 km/h
Explanation:
IN order to calculate the average speed of a train that goes 5 km from the sports complex to downtown you just need to use the formula for speed:
[tex]speed=\frac{distance}{time}[/tex]
Now you have to remember that you have time in minutes, and that in your options you have hours, so you need to convert minutes to hours:
[tex]\frac{60 minutes}{1 hour}= \frac{30 minutes}{x} \\x=\frac{30minutes*1 hour}{60 minutes} \\x=.5 hours[/tex]
Now that you have the time in hours you just insert the values into the first formula:
[tex]speed=\frac{distance}{time}\\speed=\frac{5km}{.5 hours} \\speed=15 \frac{km}{h}[/tex]
Your answer is 10 kilometers per hour.
