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.

Trinity (height 58 cm) and Selena (height 106 cm) are standing in a ground. If distance between their toe is 55 cm, what is the distance between their heads?

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?