<human>:  Marcos has to get across a 5 mile lake in his speedboat in 10 minutes so he can make it to work on time. How fast does he need to go in miles per hour to make it?
<bot>: How many minutes does it take to travel 5 miles? ** 10 minutes for 5 miles means 10 minutes / 5 miles = <<10/5=2>>2 minutes/mile
How fast does Marcos need to go in miles per hour? ** 1 hour is 60 minutes so 60 minutes/hour / 2 minutes/mile = 30 miles/hour
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