Question

Orlando rode his skateboard 1/4 mile down the road to his friend's house. The trip took him 1/20 hour. What was his average speed in miles perhour ?

Answer 1

To answer this question, we need to remember that the average speed is given by:

If we have that Orlando rode his skateboard 1/4 mile, then:

• The total distance is 1/4 mile.

If the trip took him 1/20 hour, then:

• The total time is 1/20 hour.

Therefore, the average speed is:

$\text{A}_{\text{speed}}=\frac{\frac{1}{4}mile}{\frac{1}{20}\text{hour}}\Rightarrow A_{speed\text{ }}=\frac{1}{4}\cdot20\frac{mile}{hour}$

Finally, the average speed is:

$A_{speed}=\frac{20}{4}\frac{\text{miles}}{\text{hour}}\Rightarrow A_{speed\text{ }}=5\frac{miles}{hour}$

In summary, therefore, the average speed in miles per hour is five miles per hour:

$A_{\text{speed}}=5\frac{miles}{hour}$