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CBSE Class 8 Answered

the population of a town was 160000 three years ago. if it has increased by 3 %  2.5% and 5 % in the last 3 years. find the present population of the town
Asked by ajayrath7 | 29 Oct, 2017, 11:28: AM
answered-by-expert Expert Answer
begin mathsize 16px style Population space equals space 160000
Growth space rate space for space the space first space year space straight R subscript 1 space equals space 3 percent sign
Growth space rate space for space the space second space year space space straight R subscript 2 space equals space 2.5 percent sign
Growth space rate space for space the space third space year space space straight R subscript 3 space equals space 5 percent sign
straight A equals straight P open parentheses 1 plus fraction numerator straight R subscript 1 space over denominator 100 end fraction close parentheses open parentheses 1 plus straight R subscript 2 over 100 close parentheses open parentheses 1 plus fraction numerator space straight R subscript 3 over denominator 100 end fraction close parentheses
straight A space equals space 160000 open parentheses 1 plus 3 over 100 close parentheses open parentheses 1 plus fraction numerator 2.5 over denominator 100 end fraction close parentheses open parentheses 1 plus 5 over 100 close parentheses
straight A space equals 160000 cross times 1.03 cross times 1.025 cross times 1.05
straight A space equals space 177366 end style
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