Physics: People tint windows dark to encourage . A. transmission B. absorption C. reflection D. transfusion

People tint windows dark to encourage . A. transmission

paigejohnson6161

16.04.2023

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:

$speed=\frac{distance}{time}$

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:

$\frac{60 minutes}{1 hour}= \frac{30 minutes}{x} \\x=\frac{30minutes*1 hour}{60 minutes} \\x=.5 hours$

Now that you have the time in hours you just insert the values into the first formula:

$speed=\frac{distance}{time}\\speed=\frac{5km}{.5 hours} \\speed=15 \frac{km}{h}$

Your answer is 10 kilometers per hour.

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