Speed=Distance/Time So Distance=Speed X Time Distance=55T Where 55 is the Car's speed and it is constant(won't change) and T is the time which is the changing variable. you can plug time values to know the distance traveled!
Ok so there are 7 different options for each of the remaining 7 people to be sat in which means that the answer can be given by 7!=7*6*5*4*3*2*1=5040 different ways