Question

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 s?

100−20

100⋅20

10020

100+20

Answer 1

100 / 20 = 5m/s

5m/s * 20s = 100m 

Answer 2

5m/s * 20s = 100m  is you answer