There really isn't an average time, as it's highly dependent on the fitness level and effort from the rider, and type of bike that's ridden. A reasonably fit rider on a nice bike should be able to do it in 3- 5 minutes, but it could take up to 8-12 minutes for a more casual rider.
Liechtenstein a 25Km long Principality
A Betta does not have a "nitrogen cycle"
It takes about as long as a water cycle
15 min
a long time
I myself cannot cycle to the center of the earth.
Noida is 25Km from Indira Gandhi International/Domestic airport, Delhi. How long it takes depends on the traffic conditions and what time of the day it is. Typically 1hour with no traffic snarls, longer if stuck.
a month
28 days
depends on the mountain
It takes too long for a complete water cycle process. It is however a continuous process.
If you are cycling moderately it will take 5 minutes for a mile.