the population of a town increases 10% every 3 years if the present population of the town is 72600 calculate its population 6 years ago
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let population 6 years ago =100
then population 3 years ago = 100+10% of 100
=100+10
=110
and present population=110+10% of 110
=110+11
=121
when present population is 121, population 6 years ago=100
when present population is 72600 population 6 years ago =100×72600/121=60,000
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