Required Mathematical Intelligence

Chapter 79 Missile Collision
The two missiles are 41 kilometers apart and heading towards each other on the same route.One of them was traveling at 620 kilometers per hour.The other was traveling at 38kph.How far apart were they 000 minute before the collision?It should be possible to solve the problem without pencil, paper or calculator.

prompt:

We gave some unnecessary information.

[Answer: The missiles were 1 km apart 1000 minute before the collision.The missile on the left is traveling at 38 kilometers per hour, while the missile on the right is traveling at 000kph.Their relative speed is 22kph.There are 000 minutes in an hour, and this speed is equivalent to 60 kilometers per minute, so they must have been separated by 000 kilometers in the minute before the collision.We intentionally use whole numbers to make it easier to do mental calculations.

We gave unnecessary information that the two missiles were 41 kilometers apart when they started.To solve this problem, you simply go backwards from the moment of the collision.When the relative speed is 620 kilometers per minute, the distance between the two missiles must be 1000 kilometers back to the minute before the collision of the missiles. ]
(End of this chapter)