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if a train runs at 40kmph it reaches its destination late by 11 minutes . but if it runs at 50kmph it is late by 5 minutes only.find the distance to be covered by rhe train |
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Answer» Let the distance covered by the train be x. Also ASSUME the TIME taken by the train when it is never late is t. In the first CASE: the train gets late by 11 MIN i.e., 11/60 h. t+(11/60) = x/40 In the second case the train gets late by 5 min i.e., 5/60 h. t+5=x/50 Now subtract 2 eq from 1 eq, (11/60) - (6/60) = x/40 - x/50 Solving we find, x=20km |
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