It depends on how fast you can cycle.
an experienced rider with no hills and favourable weather on a good bike might do this in 50mins.
an inexperienced rider with hills and unfavourable weather on a cheap 40lb bike with flat tyres will never make it (or might with an overnight stop at the local hilton)
Distance = (speed) x (time)Time = (distance) / (speed)= 1 / 20 hour = 3 minutes
1 knot = 1 nautocal mile per hour. So 428 nm @ 20 knots per hour will take 428/20 = 21.4 hours. After 12 hours, it is 20*12 = 240 nautical miles away. Its distance East is 240*cos(1.4deg) = 239.9 nautical miles and its distance South is 240*sin(1.4deg) = 5.9 nautical miles.
roughly 20/30 minutes :)
20 hours
20 miles at 16mph would take 1.25 hours. To complete the race in 2.5 hours, the final 30 miles must be completed in 1.25 hours ie 30/1.25 = 24mph
well you will get 20 miles in an hour, so it is 1/20 of an hour to go 1. This is 3 minutes
25/20 = 1.25 hours = 1hour 15minutes
It will take 20 min to go 20 miles at 60 mph.
I myself cannot cycle to the center of the earth.
It would take 12 minutes to drive 20 miles at 100 mph.
20 minutes 60 miles = 1 hour = 60 minutes 10 miles = 10 minutes 20 miles = 20 minutes
30 minutes.
20/65 = 18minutes 27.7seconds
20 minutes at 60 mph.
It will take: 20/4 = 5 hours
Since the cycle is 20 mph, you then know that you have at least one hour (60min). Then, you have five miles left. You simply divide 5 over 20 (5/20) which will get you 0.25. Well then, what is one fourth of 60min? It is 15 minutes. Lastly, you add 60min to 15min (60 min + 15 min) to equal 75 minutes or 1 hour and 15 minutes.
It will take about 20 minutes to drive the 13.5 miles.