Question

8. A car travels a certain distance with a speed
of 40 ms-1 and returns with a speed u. If
the average speed for the whole journey is
48 ms-1, what is the value of u?
(Ans. 60 ms-1)​

Answer 1

Answer:

See the picture.

Step-by-step explanation:

In the cases where distance is mentioned, we use Harmonic Mean(H.M.) to calculate the average velocity.

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