Question

A jogger runs 6km north, 5km east, then another 4km north. Her average speed is 8 km/h. How long will it take her to complete her run?

Answer 1

t = 1.875 hours

Step-by-step explanation:

Speed

The speed is the rate at which an object moves. If the speed is constant, then the formula to calculate it is:

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

Where d is the distance traveled in time t.

The jogger runs 6 Km plus 5 Km plus 4 Km north for a total of 15 Km.

It's given her average speed is 8 Km/h. We can calculate the time take to complete the run by solving the above formula for t:

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

`\displaystyle t=(15\ Km)/(8\ Km/h)`

t = 1.875 hours