Finding Increase or Decrease Percentage in Situations
The populatio...
Question
The population of a place increased to 54000 in 2003 at a rate of 5% per annum. Find the population in 2001.
A
48980 (approx)
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B
46480 (approx)
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C
49910 (approx)
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D
47970 (approx)
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Solution
The correct option is A 48980 (approx) Let P be the population in 2001, i.e., 2 years ago Then, PresentPopulation=P×(1+5100)2 ⇒54000=P×105100×105100 ⇒P=54000×100×100105×105=48979.59 Hence, the Population in the year 2001 is 48980.