Physical solution:

Solution:

S car (six seconds ago) = 25m+1m+2m+3m+4m+5m+6m = 46m.

S people (6 seconds ago) =6*6m=36m.

46m > 36m

∴ people from s car company

Can't catch up

Minimum distance = 46m-36m =10m

Mathematical solution:

Solution: let it run for x seconds and the distance is ym.

Y people =6x.

Y car = 25+ 1+2+3+...x

=25+( 1+x)x/2

Let x=6.

Y people =36

Y car =46

So there are more cars Y than people Y (x=6).

At this time, the distance ymin=46-36= 10(m).