Best Answer

15 miles is equal to 15 x 1.609344 = 24.14016 kilometres. Dividing 400 kilometres by 24.14016 kilometres per hour. and rounded to two decimal places, gives 400/24.14016 = 16.57 hours or approximately 16 hours 34 minutes.

Q: How long does is take to travel 400km at 15 miles per hour?

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