Reasoning
Average Speed for Equal Distances
Calculate average speed over two equal distances.
Average Speed = 2uv / (u + v)
Formula Explanation
For equal distances travelled at speeds u and v, average speed is their harmonic mean.
Variables Explained
u and v = Speeds over the two equal distances.
Solved Example
A vehicle travels equal distances at 30 km/h and 60 km/h.
Average speed = 2×30×60 / (30+60) = 40 km/h.