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.
How long is a 5K? You're a new runner and you keep hearing about it. Your friends have encouraged you to sign up for one, but you're not sure how long a 5K is and if you can do it. The K stands for kilometer. A kilometer is 0.62 of a mile, which makes a 5K race 3.1 miles long or 16368 feet long or 5000 meters long. When you hear about races such as the Carlsbad 5000, Santa Monica 5000 or Reno 5000, you can know that it is a 5K or 3.1-mile distance event.