While travelling from Nashik to Daman, Harsh drove for 1 hour at a speed of 50 km/h and for the next three hours at 60 km/h. What was his average speed for the whole trip?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 57.5 km/h.
Harsh travels from Nashik to Damant for 1 hr at a speed of 50 km/h. Next 3 hrs with a speed of 60 km/h.
Average speed = (Total distance)/(Total time)
Average speed of Harsh = [(1 × 50) + (3 × 60)]/( 1 + 3) = (50 + 180)/4 = 230/4 = 57.5 km/h