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The distance from Redville to Bluetown is 155 mi by ferry. It takes 6 hr less to travel by the same ferry from Bluetown to Greenopolis, a distance of 62 mi. What is the average speed of the ferr
The distance from Redville to Bluetown is 155 mi by ferry. It takes 6 hr less to travel by the same ferry from Bluetown to Greenopolis, a distance of 62 mi. What is the average speed of the ferry?