SOLUTION: a car and a truck is traveling north on a highway. the truck has a speed of 45 miles per hour and the car has a speed of 57 miles per hour. if the truck is ahead of the car, what i

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: a car and a truck is traveling north on a highway. the truck has a speed of 45 miles per hour and the car has a speed of 57 miles per hour. if the truck is ahead of the car, what i      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 558685: a car and a truck is traveling north on a highway. the truck has a speed of 45 miles per hour and the car has a speed of 57 miles per hour. if the truck is ahead of the car, what is the relative velocity?
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
The car is catching up to the truck at a rate of 57-45 or 12 miles per hour.
The distance between them is shrinking at a rate of 12 miles per hour.
But since it's shrinking their relative velocity is -12 miles per hour.