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two express trains started at the same time from two stations X and Y proceed towards each other at speeds of 75 mph and 45 mph respectively. when they met , it was found that one express train has travelled 340 miles more than the other.what is the distance between the two stations X and Y?

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TCS Other Question

two cyclists start biking from a trail's start 3hrs apart.the second cyclist travels at 10kmph and starts 3hrs after the first cyclist who is travelling at 6mph .how long will it take the second cyclist to catch up with the first? assume a project team of 4 students. the project guide had estimated that every one of the students would take approximately 200 working hours to complete the project .but the first two students lagged by 20 hrs each while the last two students completed their tasks 10hours each in advance.by what % is the actual working hours exceed the actual estimation?