Question
A man travels from Town A to Town B at 40 km/h and
returns from B to A at 60 km/h by the same route. What is his average speed for the whole journey?Solution
ATQ, For the same distance both ways, average speed = (2xy)/(x + y), where x and y are the two speeds. Average speed = (2 × 40 × 60) / (40 + 60) = (4800) / 100 = 48 km/h.
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