If 5% more is gained by selling an article for Rs. 1000 than by selling it for Rs. 20, the cost of the article is?  Choose the correct choice:
A) 127
B) 1600
C) 1200
D) 1680
E) 1800
Let C.P. be Rs. x.   Then, 5% of x = 1000 - 20= 80   x/20 = 80 =&gt; x = 1600   Answer: 1600
<result>B</result>
If 5% more is gained by selling an article for Rs. 1000 than by selling it for Rs. 20, the cost of the article is?