The profit earned by selling a chocolate for Rs. 900 is double the loss incurred when the same chocolate is sold for Rs. 490. At what price should the chocolate be sold to make 25% profit?
A merchant has 640 kg of sugar, part of which he sells at 2% loss and the rest at 6% profit. He gains 3% on the whole. What is the difference between the quantities of sugar sold at 2% loss and that sold at 6% profit?
