Maths

Tony is a developer who brought a commercial building in the city the building is to be 30m x 20m and 40m high

1.Determine the surface area of the building (all walls and the roof)

2. there are 6 cylindrical water tanks on the roof. each is 3m in diameter and 2m high. determine the amount of water that can be stored in these tanks. give the answer in kilo liters.

3. these water tanks need to be painted every 5 years. find the cost of painting these tanks if the paint cost $120 for 10L bucket and $35 for 2L can and a labour cost $420 per tank. 1L of paint can cover 7m2

4. the rest of the roof tony wants to use for solar panels. Each panel is 1.2m x 80cm. How many panells can he put on the roof? (do not forget there are already 4 water tanks on the roof draw diagram and block out the square area needed for the water tanks

5. by law every worker in a building needs 8m3 of air. find out the number of people that can work on each floor and in the whole building the building has 9 floors the ground floor is 5m high and all others are 4m high.

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