The question gives no information concerning the distance the person covered, so his speed can't be calculated. The ability to travel 530 minutes in 10 hours requires moderate sedation.
530 centimeters = 208.661"
530 millimeters = 20.87 inches.
Central European Time is typically five hours ahead of Eastern Standard Time so, 10:30 am EST is 3:30 pm CET. However, from March through October some countries switch from CET and use Central European Summer Time which is six hours ahead, therefore 10:30 am EST would be 4:30 pm CEST.
9
The parameters you cite contain eight hours and 30 minutes.
6 hours.
Time = distance / speed = 530 / 75 = 7.0666.. hours = 7 hours and 4 minutes.
530 minutes is 8 hours, 50 minutes.
7.75 hours
This is equivalent to 16 hours.
1460
530 / 80 = 6.625 hours
Ten Hours
9
1360
Ten hours.