Rahul travels a certain distance at a speed of 4 km/h and returns at a speed of 3 km/h via same route. What was his average speed for the entire journey (correct to 2 decimal places)?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 3.43 km/h.
Speed on the way out = 4 km/h
Speed on the way back = 3 km/h
Average speed = 2Ss/(S + s)
Average speed = (2 × 4 × 3)/(4 + 3) = 3.43 km/h