Question

Distance of Agra from New Delhi is 207 km by road if a card take 4 hour 30 minutes to cover this distance then find its average speed​

Answer 1

Answer:

Further, please know that,if the same distance is being traveled in two parts of the journey, the average speed of the complete journey = Harmonic Mean of the individual speeds.

Hence, here, the average speed = harmonic mean of 60 and 80 = 2*60*80/(60+80) = 480/7 ≈ 68.57 km/hour.

Hope this helped