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Saste toh main shoes bhi noi pehnta.Q1.A train travels in a straight line at a constant speed of 60 km/h for a particular distance d and then travels another distance equal to 2d in the same direction at a constant speed of 80 km/hr in the same direction as it was in the it was previously going a) What is the average speed of the train during the whole journey |
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Answer» Answer: Let DISTANCE from A to B=x KM= distance from B to A. Time taken by train from A to B = 60 x Time taken by train from B to A = 80 x hr Total time taken by train = 60 x + 80 x = 240 7x hr average speed= total time total distance = 240 7x
2x = 7 480 km H −1 |
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