A man travels a distance of 2 km by walking at a speed of 6 km/hr. He returns back at a speed of 4 km/hr. What is his average speed?
Q1. A man travels a distance of 2 km by walking at a speed of 6 km/hr. He returns back at a speed of 4 km/hr. What is his average speed?
Answer: 4.8 kmph
Explanation: For a round trip, average speed = 2ab/(a+b) = (2×6×4)/(6+4) = 48/10 = 4.8 km/h.