If the population of a certain country increases at the rate of one person every 15 seconds, by how many persons does the population increase in 55 minutes? Choose the correct choice:
A) 80
B) 100
C) 150
D) 180
E) 220
Since the population increases at the rate of 1 person every 15 seconds, it increases by 4 people every 60 seconds, that is, by 4 people every minute. Thus, in 55 minutes the population increases by 55 x 4 = 220 people.   Answer. 220.
<result>E</result>
If the population of a certain country increases at the rate of one person every 15 seconds, by how many persons does the population increase in 55 minutes?