Question

A car travels with speed v, for the first half of the journey distance, during the second half of the
journey distance it travelled with a speed of v2 for half of the time and with a speed of v3 for
remaining journey time. Find the average speed.
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Answer 1

Answer:

$</p><p>Average \: velocity = \frac{2v1(v2+v3)}{2v1+v2+v3}\\ \\ \\</p><p>for\: derivation \: refer\: the \: attachment$