Oksana can complete some work in 60 days, while Alicja can complete the same work in 40 days. They started the work together, and when the work was half complete, Alicja fell ill and Oksana had to finish the remaining work. How long did it take to complete the work?
A shopkeeper mixes two variants of sugar in the ratio 3:2. The first variant costs 25 per kg, while the other costs 30 per kg. If the mixed sugar is sold at the price of 33.75 per kg then find the profit/loss percent incurred by shopkeeper.