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The question in the pic is askin for average speed of the journey. Should the speed be calculated as (speed1+speed2+speed3)/3 or total distance /total time? Why?

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Manu Chadha
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    The average speed is total distance divided by time. – Vasili Oct 14 '22 at 12:38
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    The second one. This is the definition of the average speed. – Peter Oct 14 '22 at 12:38
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    Variation of the classic question: if you travel for 60 miles at $(30)$ miles per hour, how fast do you have to travel on the return leg of $(60)$ miles, in order to have an average overall average speed of $60$ miles per hour, on the two legs of the journey, combined? Answer: your speed on the return leg must be $~+\infty.$ – user2661923 Oct 14 '22 at 12:41
  • Speed is how much distance you cover in a period of time – Vasili Oct 14 '22 at 12:42

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