Hello everyone,

Could someone please show me how to do this problem?

A sqaure walled city of unkown dimentions has 4 gates, 1 at the center of each side. A tree stands 20 paces from the north gate. One has to walk 14 paces southward from the south gate and then turn west and walk 1775 paces before he can see the tree. What are the dimensions of the city? Answer: Each side is 250 paces long

Solve the problem using a strategy that involves proportions

Would it be like 20+y+14=y-1775 or something like that?

Thank you very much