At a speed of 3.5 miles, or 5 kilometers, per hour, it takes a person roughly 24 minutes to walk 2 kilometers. The Centers for Disease Control and Prevention classify speeds 3.5 miles an hour and faster as "brisk" walking. The more briskly a person walks, the faster he can travel a distance of 2 kilometers.
The CDC recommends a person walk briskly for at least 30 minutes every day Recent studies on walking show increasing walking speed increases life expectancy. Walking speed, like blood pressure, is an indicator of general health that crosses lines of height, race and gender.