Question

A runner runs a distance of 640 metres in a time of 80 seconds.
What is his average speed?

Answer 1

8m/s

Explanation:

Speed is equal the distance upon time.

640/80

so speed is equal to 8m/s

Answer 2

8 meters per second

Explanation:

We can divide meters by seconds to get his average speed in meters per second. -- 640 m / 80s = 8 m/sec (meters per second). We can also figure out his average speed in minutes by multiplying 8 by 60 (because there are 60 seconds in a minute), 8 * 60 = 480 m/min (meters per minute).