The size of the crowd is 12,000
This is the portion covered by the shape.
Analysis:
Area of field = 100 x 300 = 30000 square feet
If 1 person covers 2.5 square feet of the file then 30000/2.5 = 12,000 persons will cover the whole field.
Learn more about area of plane shapes: brainly.com/question/4895332
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