How much time elapses before the two cars collide? Two cars, A and B, are 400 meters apart. Car A travels due east at 30 meters per second on a collision course with car B which travels due west at 20 meters per second.
The correct answer to this question is B. If two cars are 400 meters apart and a collision occurs while one is traveling east at 30 meters per second and the other is traveling west at 20 meters per second, you would need to solve for x to find out how much time elapsed before the two cars collided.
To do this, you would multiply one speed of 30 by the time of x to the other speed of 20 to the time of x to equal the distance of 400 meters. When you add the 30x and the 20x, you get 50x. You would then need to divide 400 by 50 to get x which equals 8 seconds.