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uniform speed of 10km/hr.? 2 cars start in the same direction from same place.the first car goes with a uniform speed of 10km/hr.the second goes at a speed of 8 km/hr in first hour & increases the speed by1/2 km each succeeding hour.After how many hours will the second car overtake the first car?ITS AN ARITHMETIC PROGRESSION QUESTION SUM OF N TERMS FORMULA