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## Population increases

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islands80 Just gettin' started!
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Population increases Thu Apr 26, 2012 11:37 pm
Elapsed Time: 00:00
• Lap #[LAPCOUNT] ([LAPTIME])
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 20 minutes?

(A) 80
(B) 100
(C) 150
(D) 240
(E) 300

OA to follow

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akash.delsaria Just gettin' started!
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Thu Apr 26, 2012 11:50 pm
I believe the solution should be:

(20*60)/15 = 80

Option A

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Thanked by: islands80
niketdoshi123 Really wants to Beat The GMAT!
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Thu Apr 26, 2012 11:58 pm
Population increases at the rate of 1 person every 15 seconds = Population increase at the rate of 4 persons per minute
so in 20 minutes the population will increase by 20*4 = 80

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