1 Answer

Stefan · Answer 1 · 2023-08-28T21:36:49+0000

To get average speed you take:

Total distance / total time = average speed

As we can see, the total distance that the motorist travelled was:

$60km+90km=150\operatorname{km}$

And, the total time taken is:

Then, his average speed is:

$\frac{150\operatorname{km}}{3h}=\frac{50\operatorname{km}}{h}$

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