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{(1)/(4)mile}{(1)/(20)\text{hour}}\Rightarrow A_{speed\text{ }}=(1)/(4)\cdot20(mile)/(hour)`

Finally, the average speed is:

`A_(speed)=(20)/(4)\frac{\text{miles}}{\text{hour}}\Rightarrow A_{speed\text{ }}=5(miles)/(hour)`

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

`A_{\text{speed}}=5(miles)/(hour)`