Question

How many kilometers will you travel in a span of 2.5 h if you are going at a speed of 5.0m/s

Answer 1

Convert 2.5 hours to seconds: this is 2.5·60=150 minutes, or 150·60=9000 seconds.

The distance is

$$d=vt=5·9000=45000\text{ m, or 45 km}.$$