How long is 11 miles in per hour?

Answer 1

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.

Answer 2

There can be no conversion. "Miles per hour" is a measure of speed, not distance. The two are measures of different characteristics and, according to the most basic principles of dimensional analysis, any attempts at comparisons or conversions between the two are fundamentally flawed.