Question

Show that the average speed of Leslie is 10 km/h when she runs to the store 5km away in 30 minutes.

How fast is that in m/s?

Answer 1

The average speed is given by Total distance/total time
To convert minutes into hours,
30 minutes=30/60 hours
30 minutes=0.5 hours
speed=5km/0.5 hours
=10km/h
To convert km/h into m/s we multiply the speed in km/h by 5/18,
so..
10km/h*5/18
=2.77 m/s(approx)