Arjun rides his bike 10 km at an average speed of 30 km/h, and again travels 14 km at an average speed of 25 km/h. What is his average speed (approx.) for the entire trip?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 26.87 km/h
Given that
The initial 10 km distance covered at a speed of 30 km/h
and again, 14 km distance covered at a speed of 25 km/h
Formula used
The average speed = Total distance covered/Total time taken
Time = Distance/Speed
Calculation
Total time taken = (10/30) + (14/25) = (50 + 84)/150 = 134/150 hours
The average speed = (10 + 14)/(134/150) = (24 × 150)/134 = 3600/134 = 26.87 km/h