Calculate the speed of an object that has travelled a given distance in a given amount of time. (distance = rate * time). Distances could be measured in meters, feet, miles or light years. Times could be measured in seconds, hours or years. The speed should be reported in meters per second (m/s). You should report any input errors.

This is done in python

An example output would look like this:

Enter the distance travelled with units: 60 m

Enter the time with units: 1 h

The rate is 0.017 m/s

Any help is appreciated