A shopkeeper mixes two variants of rices in ratio 3:2. The first variety costs 10 per kg, while other costs 20 per kg. If the mixed rice is sold at price of 9.8 per kg. Find the profit/loss incurred by shopkeeper.
Christina is in the process of making ice cream. She has heated all the ingredients to 50 °C and put them in refrigerator to freeze. If the cooling rate is 9 °C per hour, what will be the temperature in freezer after 13 hours ?
Ashani decides to pave an area measuring 10 m by 79.55 metres in his garden with terracotta tiles. He decides to buy tiles measuring 20 cm. by 185 cm. at the cost of J$ 40.38 per tile. What will be the total cost he incurs in paving his garden?