You have A car that you have drive For 55000km whit avarage speed of 77km/h. How long have you been siting in that car?

If 55,000 is the total number of Km driven by the car @ an average of 77 Km per hour, then:

55,000 / 77 =714 2/7 hours, or about 29.76 days spent sitting in the car.