A man covers 1/3rd of journey by cycle at 50 Km/h, the next 1/3 by car at 30 km/h, rest walking at 7 km/h. average speed during the whole journey.?
If a person covers 1/3rd of his journey by cycle at 50, the next 1/3rd by car at 30 kmph and the rest by walking at 7 km/h, what is his average speed during the whole journey?