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!
114 kms per hour highway 102 kms dirt road
9.4 kms at its circumference
125 Kms/hour
110-120 kms/hour
20 kms