A train covers 40 km between two stations in 45 minutes. It covers another 30 km in 30 minutes and the remaining 20 km in 15 minutes. Find the average speed of the train for the whole journey.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 60 km/h.
Total distance = 40 + 30 + 20 = 90 km
Total time = 45 + 30 + 15 = 90 minutes
⇒ 90/60 = 1.5 hours
Average speed = = 60 km/hr