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The population of a city increases by 4% per year but due to migration it decrease by 1% per years. What will be the percentage increase in population in 3 years?
(a) 9%
(b) 9.27%
(c) 27%
(d) 12%
(e) None of these
Read Solution (Total 4)
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- (b); Actual increase in population=3%
Let, earlier population=100 then the population after 3 years
=100(1+3/100)^3=109.2727
∴Required percentage=9.27% - 8 years agoHelpfull: Yes(22) No(2)
- 9.27%
compound rate of increase
- 8 years agoHelpfull: Yes(2) No(1)
- this is compound rate of increase,
actual increase = 4-1=3%
100(1+3/100)^3=109.2727
Required percentage=9.27% - 8 years agoHelpfull: Yes(2) No(0)
- use compound intrest concept
- 7 years agoHelpfull: Yes(1) No(2)
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