16. If you walk 3 kilometers in 30 minutes, what is your average speed in kilometers per hour?

Plss anybody know how to do this? ? i need the answers from a through d

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

Often called simply "velocity," this is the velocity of an object at a particular moment in time.