A person by selling an article for Rs. 450, loses 20%. In order to make a profit of 20% what is the price at which he must sell?
On selling an article for Rs. 48, a shopkeeper loses 20 %. In order to gain 20 %, what would be the selling price ?
(a) Rs. 52
(b) Rs. 56
(c) Rs. 68
(d) Rs. 72