Question

A person runs a distance of 3.5 km for 30 minutes , then 2.5 km for 30 minutes . The runner's average speed is equal to :

Answer 1

Given:

The distance is d1 = 3.5 km in time t1 = 30 minutes = 0.5 h

The distance is d2 = 2.5 km in time t2 = 30 minutes = 0.5 h

To find the average speed of the runner.

Step-by-step explanation:

The average speed can be calculated as

`\begin{gathered} v_(av)=\frac{total\text{ distance}}{total\text{ time}} \\ =(d1+d2)/(t1+t2) \\ =\frac{3.5\text{ +2.5}}{0.5+0.5} \\ =6\text{ km/h} \end{gathered}`

Final Answer: The average speed is 6 km/h.