about 90 to 95 kms
Time = Distance/Speed = 100/140 = 0.714 hours = 43 minutes, approx.
It depends on whether you are walking, cycling, driving, flying in a commercial aircraft, combat aircraft or rocket!
Speed of sound in kms-1 = 0.3432 kms-1
475,440 square Kms
Time = (distance) / (speed)Time = (400km) / (140 km/hr) = 2.857 hours = 2hrs 51min 25.7sec (rounded)
This answer would depend on your driving speed. There is 1.61 kms in a mile, so if you know your speed per mile or km, you can calculate it. Google it!
9.4 kms at its circumference
114 kms per hour highway 102 kms dirt road
30 minutes
110-120 kms/hour
20 kms