The Monkey King searched for the whereabouts of the devil. It only took 4 minutes to travel downwind 1000, and it was only 600 miles back. He asked what the wind speed was. Hurry up!

Suppose the speed of the Monkey King is: V 1.

Wind speed: V2

The following equations can be listed:

1000/(v 1+V2)= 4;

600/(V 1-V2)=4

By solving the equation, we can get: v1= 3200; V2=800