The number of trees in a town is 17640. If the numbers of trees increases annually at the rate of 5%, then how many trees were there 2 years ago?
A) 14000 B) 15000 C) 16000 D) 18000
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Answer:
No. Of trees in a town=17640
Rate increases= 5%
We've to find how many trees were there 2 years ago.
Therefore, A=P/[1+R/100]^n
A= 17640/[1+5/100]^2
A= 17640/[100+5/100]^2
A= 17640/[105/100]^2
A= 17640×100×100/(105×105)
A= 176400000/11025
A= 16,000
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