Freebase(0.00 / 0 votes)Rate this definition: In a parliamentary or semi-presidential system of government, a reserve power is a power that may be exercised by the head of state without the approval of another branch of the government.
5k race = 3.1 miles. Most beginner runners will take an average time to finish a 5k race of 30 - 40 minutes. 10k race = 6.2 miles. The typical time it takes to do a 10k race is 1 - 1 1/2 hours. Half marathon = 13.1 miles, 21.7 kilometres. A respectable time it takes to do a half marathon is 2 - 2 1/2 hours. Marathon = 26.2 miles, 41.2 kilometres. The average time it takes runners to do a marathon is between 4 - 5 hours.
A half-marathon is 13.1 miles, and a standard marathon is 26.2 miles. ANYTHING that is longer than 26.2 miles is considered to be an Ultra-Marathon. They have distances ranging from 50K (31.1 miles) on up to 100 MILES! My first marathon was the 1991 Marine Corps Marathon. 5k run is 5 kilometers (3.11 mi), and a 10k would be 10 Kilometers (6.21 mi). A marathon is 42.195 kilometres (26 miles 385 yards) and a half marathon is 21.0975 kilometers, or 13 7/64 miles, about 13.1 miles.