Answer to Question #285693 in Physics for kin

Question #285693

can i just use 60 km/hr as average velocity for boat b

Expert's answer

No, because the average velocity is zero (it is total displacement, which is zero, divided by total time).

The average speed is total distance, which is 2d, divided by total time:

s_B=\dfrac{d+d}{d/30+d/90}=45\text{ km/h}.

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