If population of certain city increases at the rate of 5%. If population in 1981 was 324135, then population in 1978 was?  Answers:
A) 120000
B) 228788
C) 280000
D) 267689
E) 127791
X * (105/100) * (105/100) * (105/100) = 324135   X = 324135/1.157625= 
<gadget id="calculator">324135/1.157625</gadget>
<output>280_000</output>
280000   Answer 280000
<result>C</result>
If population of certain city increases at the rate of 5%. If population in 1981 was 324135, then population in 1978 was?