In fact, it is very simple, 60 seconds -40 seconds =20 seconds. It is known that it takes 20 seconds to walk two bus lengths at the speed of the train, and it takes two bus lengths from beginning to end.

20 divided by 2= 10 second

Solution: Let the vehicle speed be x seconds 1 meter.

The length of this car is y meters.

60X=2Y+ 1000

1000=60X-2Y

The deformation is y = 1000-60x.

-

2

X=20

Y= 100