Question 293156
I think that their relative speed is {{{s - 3}}} km/hr
where {{{s}}} is the speed of the car.
The car looks like it's going {{{.1/4}}} km/min
or {{{.1/4}}} km/min x {{{60}}} min/hr = {{{3/2}}} km/hr
{{{s - 3 = 3/2}}}
{{{s = 9/2}}}
The speed of the car is 4.5 km/hr
Hope I got it right