A man gains 10% by selling an article for a certain price. If he sells it at double the price, the percentage of profit will be. Choose the correct choice from the following answers.
A) 130%  B) 120%  C) 150%  D) 160%  E) 170%
Explanation:   Let the C.P. = x,   Then S.P. = (110/100)x = 11x/10   New S.P. = 2(11x/10) = 22x/10   Profit = 22x/10 - x = 12x/10   Profit% = (Profit/C.P.) * 100   =&gt; (12x/10) * (1/x) * 100 = 120 %   Option 120%
<result>B</result>
A man gains 10% by selling an article for a certain price. If he sells it at double the price, the percentage of profit will be.