Chen rode his skateboard 3 3/4 miles in 3/4 of an hour. What was his average speed in miles per hour?
Do 3.75÷.75=5
You will end up getting 5, which is 5 miles per hour.
Hope this helped!!
His average speed in miles per hour is:
5 miles per hour.
We know that the average speed is the ratio of the distance over time.
i.e.
\(\text{Average speed}=\dfrac{\text{Distance}}{\text{Time}}\)
Here we have:
Chen rode his skateboard 3 3/4 miles in 3/4 of an hour.
Distance traveled is:
\(3\dfrac{3}{4}=\dfrac{15}{4}\ \text{miles}\)
and the time taken is:
\(=\dfrac{3}{4}\ \text{hour}\)
Hence,
\(\text{Average speed}=\dfrac{\dfrac{15}{4}}{\dfrac{3}{4}}\)
i.e.
\(\text{Average speed}=5\ \text{miles per hour}\)