Question

14. John rides his motorcycle for 0.2 hours with a constant speed of 68 km/h and then foranother 13 minutes with a constant speed of 102 km/h. What is his average speed for thetotal trip?

Answer 1

We must calculate the weighted average as follows:

`\begin{gathered} (68\cdot0.2+102\cdot(13)/(60))/(0.2+(13)/(60)) \\ (13.6+22.1)/(0.416)=85.68 \\ \end{gathered}`

Therefore, the average speed is 85.68 km/h