A man, who practices running, covers the first half of the distance at 4 km/h and the remaining half of the distance at 6 km/h. What is his average speed?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 4.8 km/h.
Let the distance covered by man is 48 km
We know that,
Time = Distance/Speed
Time taken in first half = 24/4 = 6 hr
Time taken in second half = 24/6 = 4 hr
Average speed = Total distance/Total Time
Average speed = 48/10 = 4.8 km/hr