7km/25min * 60min/hr = 420/25 km/hr = 16.8 km/hr
If he says the speed is 28km/hr, he's working on some other problem.
if there are various speeds, the average speed is the total distance divided by the total time.
Marie traveled to work (7km) in 25 minutes. What was her speed?
I got 16.8km/h but my teacher said it's 28km/h and I have no idea how he got that.
Also, how do you calculate average speed when there's more than one speed? (this is just for the next question)
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