1.

John covers a part of the journey at 20 km/hr and the remaining at 70 km/hr , taking total of 8 hours to cover the distance of 400 km. How many hours he has been driving at 20 km/hr?

Answer»

John covers a part of the journey at 20 km/hr and the remaining at 70 km/hr , taking total of 8 hours to cover the distance of 400 km. How many hours he has been driving at 20 km/hr?




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