NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2016

RRB NTPC · Question 6

The train runs for 2 ½ hours at a speed of 62 km/hr and at a speed of 68 km/hr for 1 ¼ hour. Find the average speed of a train A. 55 km/hr B. 64 km/hr C. 62 km/hr D. 70 km/hr

  1. A

  2. D

  3. C

  4. B

Show answer & explanation

Answer: (D) B

Explanation

Distance = 62 × 2.5 + 68 × 1.25 = 155 + 85 = 240 km in 3.75 hours. Average speed = 240/3.75 = 64 km/h.