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 10 minutes?	Pick: A) 40 B) 100 C) 150 D) 240 E) 300
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 10 minutes the population increases by 10 x 4 = 40 people.   Answer. 40.
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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 10 minutes?