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.
30 minutes.
20 minutes 60 miles = 1 hour = 60 minutes 10 miles = 10 minutes 20 miles = 20 minutes
20/65 = 18minutes 27.7seconds
20 minutes at 60 mph.
It will take: 20/4 = 5 hours
It will take about 20 minutes to drive the 13.5 miles.
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.