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Anshul travels every day from Dadar to Churchgate and back to Dadar by train which takes 40 minutes for each journey. At a particular day the train starts 10 minutes late from Dadar but reaches Churchgate on time, while on return travel from Churchgate due to some problem train reaches Dadar 14 minutes late. If the average speed of the train on this particular day was 60 km/h what is the general average speed of the train? 1. 66 km/h2. 65 km/h3. 64 km/h4. 63 km/h

Answer» Correct Answer - Option 4 : 63 km/h

Regular time required to complete the journey = 40 + 40 = 80 min

On a particular day, time required to complete the journey = 40 – 10 + 40 + 14 = 84 min

Let V be the general average speed(km/h) of the train.

As we know, average speed is inversely proportional to the time taken if the distance covered is constant.

Thus, V × 80 = 60 × 84 V = (3/4) × 84 = 63 km/h



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