A car starts with a speed of 19 km/hr in the 1st hour and increases its speed every succeeding hour by 2km/hr.After 2 hours , a second car starts from the same place and direction with a speed a 23 km/hr in the 1st hour and increasing the speed by 6 km /hr every succeeding hour. After how many hours
will the second car overtake the first if both go non-stop?
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Answer:
After 9 hours train cross other train
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