Step 1
Convert blocks to miles
I apply a rule of three
16 blocks equals----------------- > 1 mile
2.5 blocks ----------------------------> X
X=2.5/16=0.15625 miles
Step 2
Convert miles to feet
we know that
1 mile-------------> 5280 feet
0.15625 miles-----X
X=0.15625*5280= 825 ft
Step 3
Convert feet to numbers of persons in line
we know that
1 person--------------> 2 ft
X--------------------> 825 ft
X=825/2=412.5------------> 413 persons
the answer is about 413 persons are ahead of Evelyn in line
