If population of certain city increases at the rate of 5%. If population in 1981 was 138915, then population in 1978 was?	Select.
A) 1,20,000 B) 1,20,080 C) 1,20,900 D) 1,29,000 E) 1,20,070
X * (105/100) * (105/100) * (105/100) = 138915   X = 138915/1.157625= 
<gadget id="calculator">138915/1.157625</gadget>
<output>120_000</output>
120000   1,20,000nswer:1,20,000
<result>A</result>
If population of certain city increases at the rate of 5%. If population in 1981 was 138915, then population in 1978 was?