You can fit 20 people in a 5 x 5 ft square. Using this ratio, how many people can fit in a 500x500 ft square?

20 people PER 5 x 5 = 25 sq ft

 

500 x 500 = 250,000 sq ft       250,000/25  sets of 20 people = 10,000 sets of 20 people   

10,000sets x 20 people = 200,000 people