11 km is a measure of distance, with dimensions [L]. Miles per hour is a measure of speed, with dimensions [LT-1]. The two measure different things and one cannot be converted to the other.
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2.2 miles divided by 12 x 60 minutes per hour = 11 miles per hour
11 knots=12.6585739 miles per hour
Answer: 11 km/h = 6.83508 mph
The question makes no sense. It seems as if you are confused about what miles per hour is. It just means how many miles you travel in one hour. So 11 miles per hour would be ... 11 miles per hour, or 11 mph.
11/3 = [3 and 2/3] miles per hour.