9. The population of a certain city was 72,000 on the last day of the year 2010. During the next
increased by 7% but due to an epidemic it decreased by 7% in the following year. Find what
the population at the end of the year 2012.
Answers
Answered by
2
Answer:
100___107
100___93
===========
100×100 = 10000 unit
107 × 93 = (100 + 7) (100 - 7) = 10000 - 49 = 9951 unit
10000 unit = 72000
1 unit = 7.2
9951 unit = 71647.2
Answered by
2
Step-by-step explanation:
Population in the year 2010 = 72000
In 2011 it increased = 7%
72000×7/100 = 5040
Population in 2011 = 72000+5040
= 77040
In 2012 decreased = 7%
77040×7/100 = 5392.8
Population in 2012 = 77040-5392.8
= 71647.2
hope this will helpful.
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