55 x 2.5 = 137.5
495 miles if you don't stop.
55 miles each hour for 6 hours. 55 x 6 = 330 miles.
55 mph (!)
55 miles.
55 miles
21 miles / 55 mph = 0.38 hours, or 23 minutes
1.090909... hours
8 hours 55 minutes.
193 miles total. 3.5 hours assuming you go 55 the entire way.
Assuming that you can maintain an average speed of 55 mph, the driving time will a little over be 2 days and 6 hours.
5*55/60 = 4.5833... miles = 7.376 kilometres, approx.