the car had to go 54 mph to catch the truck .2hrs x 45 mph =90+ 10 hrs x 45 mph for the truck and car to meet=54 mph or another way to say it, truck traveled 540 miles in 12 hrs time, 10x 45+90=540, the car went 54 mph to catch it, if the truck never stopped and both left the same point 2 hrs apart.about the solution q, i dont know
