Alisha is in the process of making ice cream. She has heated all the ingredients to 40 °C and put them in refrigerator to freeze. If the cooling rate is 11 °C per hour, what will be the temperature in freezer after 9 hours?
A shopkeeper mixes two variants of wheat in the ratio 1:2. The first variant costs 18 per kg, while the other costs 15 per kg. If the mixed wheat is sold at the price of 12.8 per kg then find the profit/loss percent incurred by shopkeeper.