The percentage profit earned by selling an article for Rs. 1620 is equal to the percentage loss incurred by selling the same article for Rs. 1280. At what price should the article be sold to make 25% profit?  Choose the most appropriate option.
A) 3000 B) 1812.5 C) 2000 D) 5600 E) 3400
C.P. be Rs. x.   Then, (1620 - x)/x * 100 = (x - 1280)/x * 100   1620 - x = x - 1280   2x = 2900 =&gt; x = 1450   Required S.P. = 125 % of Rs. 1450 = 125/100 * 1450 = Rs. 1812.5.   ANSWER 1812.5
<result>B</result>
The percentage profit earned by selling an article for Rs. 1620 is equal to the percentage loss incurred by selling the same article for Rs. 1280. At what price should the article be sold to make 25% profit?