We know that on each side of the street it is 10 feet deep and 1 mile long, which 1 mile = 5280 feet. So, lets get the area first.
First get the area of one side of the street. Note * means to multiply
10ft * 5280ft =

We know that one person occupies 2 square feet so
1 person =

We take 52800 and divide it by 2, which 2 represent 1 person
26400 / 2 = 26400
Now we know that one side represent 26400 people. We have two sides so we times this by 2
26400 * 2 = 52800 people
Answer = 52,800