RRB NTPC · Question 86
A person covers the first 176 kilometers at a speed of 16 kilometers/hour and the next 64 kilometers at a speed of 32 kilometers/hour. What would be the approximate average speed for the first 240 kilometers of the journey? A. 13 Km/h B. 27 Km/h C. 18.5 Km/h D. 21 Km/h
Show answer & explanation
Answer: (D) C
Explanation
Time = 176/16 + 64/32 = 11 + 2 = 13 hours. Average speed = 240/13 ≈ 18.5 km/h.