the distance between Delhi and Bhopal is 600 kilometre.aaj train travels the first 180 km at a uniform speed of 60 km per hour, the next 170 kilometre at a uniform speed of 85 km per hour, the next 130 km at the uniform speed of 65 kilometre per hour. at what speed should it travel the remaining distance to average 60 km per hour for the entire journey.
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