RRB NTPC · Question 57
A car covers the distance from Chennai to Coimbatore in 8 hours. The first half of the journey has been covered at a speed of 73 km/h and the second half at 81 km/h. What is the distance from Chennai to Coimbatore? A. 614.34 km B. 600 km C. 592 km D. 632.65 km
Show answer & explanation
Answer: (A) A
Explanation
Average speed for two equal halves = 2 × 73 × 81/(73 + 81) = 11826/154 ≈ 76.79 km/h. Distance = 76.79 × 8 ≈ 614.34 km.