Distance between two places is x km. Time taken to cover it is y hrs. Distance remaining unchanged if the speed is now doubled, show that the time taken will be halved.
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A train covered a certain distance at a uniform speed. If the train would have been 10 km/h faster, it would have taken 2 hours less than the scheduled time. And, if the train were slower by 10 km/h; it would have taken 3 hours more than the scheduled time. Find the distance covered by the train.
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