A can do a piece of work in 14 days while B can do it in 21 days. They began together and worked at it for 6 days. Then, A fell ill and B had to complete the remaining work alone. In how many days was the work completed?
A shopkeeper buys an article for rs 400 and marks it for sale at a price that May give him 80 partisat profit on his cost.he however gives 15 partisat discount on the marked price on his customer. Calculate :-[¡] the marked price of the article. (¡¡)the discount in rupees given to the customer. (¡¡¡) the actual percentage profit made by the shopkeeper.