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Mathematics, 12.09.2019 23:30 chriscook5176

Susie has planned a trip to a city 60 miles away. she wishes to have an average speed of 60 miles/hour for the trip. due to a traffic jam, however, she only has an average speed of 30 miles/hour for the first 30 miles. how fast does she need to go for the remaining 30 miles so that her average speed is 60 miles/hour for the whole trip?

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