A man covers a certain distance at a speed of 60 km/h and returns at a speed of 40 km/h. What is his average speed (in km/h) for the entire journey?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 48
If the distance is constant then the average speed = 2xy/(x + y)
= 2 × 60 × 40/100 = 48 km/h