A student was practicing for a track meet. She ran 400 m in 30 seconds. What is her average speed?

Question

A student was practicing for a track meet. She ran 400 m in 30 seconds. What is her average speed? 

Answer 1

400 meters in 30 seconds = 67.1081 miles per hour= speeding on most US highways

= 800 meters per minute

= 400/30 = 40/3 = 13 1/3 meters per second

= 48,000 meters per hour

this seems maybe twice as fast as fastest on record

a one minute 440 yard lap is very fast

4 440 yard laps in 4 minutes is near record 4 minute mile