Question

An Olympic runner completes the 200-meter sprint in 23 seconds. What is the runner’s average speed? (Round your answer to the nearest tenth of a meter per second.) 0.9 m/s

Answer 1

Since speed=distance/time, you would divide the distance (200 meters) by 23 seconds. Your answer rounded up to the nearest tenth is 8.7 seconds

Answer 2

divide the distance by the time, since you want the answer in meters per second there are no other conversions required.

200/23 = 8.6956 meters per second

round to nearest tenth would be 8.7