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30 May 2022, 03:15
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Difficulty:
35%
(medium)
Question Stats:
67% (01:35) correct
33%
(01:27)
wrong
based on 116
sessions
History
Date
Time
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Not Attempted Yet
In a certain country, a person is born every 3 seconds and a person dies every 10 seconds. Therefore, the birth and death rates account for a population growth rate of one person every
A. \(3 \frac{1}{3}\) sec
B. \(4 \frac{2}{7}\) sec
C. \(7\) sec
D. \(11 \frac{2}{3}\) sec
E. \(13\) sec
A. \(3 \frac{1}{3}\) sec
B. \(4 \frac{2}{7}\) sec
C. \(7\) sec
D. \(11 \frac{2}{3}\) sec
E. \(13\) sec
05 Jun 2022, 00:00
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Bunuel
In a certain country, a person is born every 3 seconds and a person dies every 10 seconds. Therefore, the birth and death rates account for a population growth rate of one person every
A. \(3 \frac{1}{3}\) sec
B. \(4 \frac{2}{7}\) sec
C. \(7\) sec
D. \(11 \frac{2}{3}\) sec
E. \(13\) sec
A. \(3 \frac{1}{3}\) sec
B. \(4 \frac{2}{7}\) sec
C. \(7\) sec
D. \(11 \frac{2}{3}\) sec
E. \(13\) sec
Take LCM of 3 and 10
Every 30 sec 10 babies are born and 3 people die
Net population change in 30 sec = 10-3 = 7
7 people are added in every 30 sec
1 people will be added in 30/7 sec
Option B
22 Jun 2022, 02:30
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every 10 secs, 3 are born and 1 dies; net change in 10 secs = 2
2 persons every 10 secs
therefore, 1 person every 5 sec
where did i go wrong? help
Posted from my mobile device
2 persons every 10 secs
therefore, 1 person every 5 sec
where did i go wrong? help
Posted from my mobile device
