Question

A person runs 15 kilometers in two hours what is his/her average speed ​

Answer 1

`\displaystyle V=7.5\ km/h`

Step-by-step explanation:

Average Speed

If an object travels a distance d in a time t regardless of the direction, the average speed is the quotient of the distance over the time:

`\displaystyle V=(d)/(t)`

It's known a person runs d=15 kilometers in t=2 hours, thus his/her average speed is:

`\displaystyle V=(15\ km)/(2\ h)`

Calculating:

`\boxed{\displaystyle V=7.5\ km/h}`