I'm confused of why the average speed isn't equal to all the speeds mentioned / the number of speeds. Like, if you're driving on a highway and for the 1st second your speed is 100 km/h, for the 2nd second your speed is 102km/h and for the 3rd second your speed is 106 km/h, your average speed would be 102km/h which you get by doing (100+102+106)/3 =102 km/h. Following this logic, wouldn't the average speed equal (12+4)/2= 8 miles per hour?

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