You can
put this solution on YOUR website!
You travel 60 kilometers in 1.5 hours. What is your average speed?
"PER" means "DIVIDED BY"
therefore
"Kilometers PER hour" means "Kilometers DIVIDED BY hours"
So to find "Kilometers PER hour" we just have to find
"Kilometers DIVIDED BY hours" or
60 kilometers DIVIDED BY 1.5 hours
gives 40 miles PER hour.
Edwin