About 25,344 people are in this crowd for the parade using the calculations it told me to use. So now that we have our answer lets break this down for you:
We have a width of 20ft (10ft for each side of the street) and We have 1 mile for our length which is 5,280ft. So now that we know these pieces of information now we can do our math below:
20 x 5,280 = 105600
105,600/25 = 4,224
4,224 x 6 = 12,344 people
Now that I have shown the math that I did let me explain what I just did. First off I got the area for the whole area of where the people were. Then I took that value and checked to see how many 25ft squared lots there were in that which there was 4,224 of them. And for every 25ft squared lot there are about 6 people so i multiplied 4,224 by 6 which gave me about 25,334 people standing in that area for the parade.