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tiffanylayton
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(9/2)-(3/2)=6/2=3
3*60*60*24=259200
population increase?
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Source: Beat The GMAT — Problem Solving |
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EricLien9122
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9 people are born and 3 people die every 2 seconds, so 6 people every 2 seconds are added.
A day has 60 seconds in a minute, 60 minutes in an hour, 25 hours in a day.
60*60 = 3600.
3600*24 = 86400 seconds in a day.
So now you can either do 86400*3 since there are 6 people added every 2 seconds. Half of 6=3. Or half of 86400=43200*6 = 259,200.
A day has 60 seconds in a minute, 60 minutes in an hour, 25 hours in a day.
60*60 = 3600.
3600*24 = 86400 seconds in a day.
So now you can either do 86400*3 since there are 6 people added every 2 seconds. Half of 6=3. Or half of 86400=43200*6 = 259,200.
