Sachin covers half of his journey at 12 km/h and the remaining half at 3 km/h. His average speed is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 4.8 km/h.
Each distance is equal.
Here, x = 12 km/h and y = 3 km/h
Average speed = (2xy)/(x + y)
= (2 × 12 × 3)/(12 + 3)
= 72/15
= 4.8 km/h