A train without stoppage travels with an average speed of 50 km/h, and with stoppage, it travels with an average speed of 40 km/h. For how many minutes does the train stop on an average per hour?
Correct Answer:
C. 12
Explanation:
To calculate the average stoppage time per hour for a train, you compare its speed without stops to its speed with stops.1. Determine the distance lost: In one hour, a train traveling at 50 km/h covers 50 km. If it only covers 40 km due to stops, it has effectively lost 10 km of travel distance.
2. Calculate time to cover that distance: The stoppage time is equivalent to the time the train would take to cover those 10 km at its full speed of 50 km/h.
3. Formula: Stoppage time per hour = (Difference in Speed / Speed without Stoppage) × 60 minutes.
4. Calculation: (10 / 50) × 60 = 1/5 × 60 = 12 minutes.The train stops for an average of 12 minutes every hour.
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