Suresh covers a distance by a cycle at 10 km/h. He returns to the starting point in a car at a speed of 50 km/h. Find the average speed for the entire journey.
Answer & explanation
Correct answer: option 2
When distance is equal, then Average speed = \(\frac{2(S1\;×\;S2)}{S1\;+\;S2}\)
Where, S1 = 1st speed and S2 = 2nd speed
ATQ,
Average speed = \(\frac{2(10\;×\;50)}{10\;+\;50}\) = \(\frac{100}{6}\) = 16.66 km/h