40 tourists are coming from Switzerland to visit Mt. Everest. They planned to stay at Everest base camp for 4 days. For this purpose, they ordered some squared base pyramid tents in Nepal. A tent can hold 8 people and each person has 6 ft×3ft space on the ground with 48 cu.ft. of air to breathe. Find the total cost of all tents at the rate of Rs.560 per ft².

The length, breadth, and height of a rectangular room are 14 ft, 13 ft, and 10 ft respectively. There are two square windows with 3 feet edges and two doors of size 6ft × 3ft in the room.

1. How much does it cost to paint four walls and ceiling of the room excluding doors and windows at the rate of Rs. 36 per square foot? Find it.
2. How much the total cost will increase to paint on the same part if the cost of painting per square meter is increased by one-third of what it was before due to the increase in the market price? Find it.

The length, breadth and height of a rectangular room are 13ft, 12ft, and 10ft respectively. There are 2 windows of size 3ft×4ft and a door of size 3ft×6ft.

1. How much does it cost to paint four walls and celling excluding door and windows at the rate of Rs. 40 per square ft? Find it.
2. By how much will the total cost of painting the same parts of the room be increased if the rate of cost per square feet is increased by 25%? Find it.

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Tiles of length 25 cm, breadth 20 cm and height 5 mm are paved on the floor of the room.

1. How much cost of carpeting is required in the room at the rate of Rs. 250 per sq.m? Find it.
2. How many maximum numbers of tiles can be paved on the floor? Find it.