Can anyone please help me with my 400 word report on average speed?

What kind of help do you need? A starting sentence or paragraph?

If so you need to explain the topic.

Posting the same question repeatedly isn't going to change the answer.

There must be more to this than just 400 words on "average speed". Could you please be a bit more specific? Do you need to know how to calculate average speed? Or what? Best wishes. You could also try Google to search for some ideas if you can't explain what you are trying to do.

Thank you, Fredg, for repeating my answer in the event the OP didn't understand it.

Again.