# Observatory

Observatory dome has the shape of a hemisphere with a diameter d = 10 m. Calculate the surface.

**Result****Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):**

**Showing 0 comments:**

**Be the first to comment!**

#### To solve this example are needed these knowledge from mathematics:

## Next similar examples:

- Half-sphere roof

The roof above the castle tower has the shape of a 12.8 m diameter half-sphere. What is the cost of this roof, if the cost of 1 square meter is 12 euros and 40 cents? - Greenhouse

Garden plastic greenhouse is shaped half cylinder with a diameter of 6 m and base length 20 m. At least how many m^{2}of plastic is need to its cover? - Pipe

How long is the pipe with an outside diameter of 1.44 m if his coloring consumed 44 kg of color. 1 kg of color coverage is 9 m^{2}. - Fit ball

What is the size of the surface of Gymball (FIT - ball) with a diameter of 65 cm? - Average

The arithmetic mean of the two numbers is 71.7. One number is 5. Calculate the second number. - Rape

The agricultural cooperative harvested 525 ares of rape, of which received 5.6 tons of rape seeds. Calculate the yield per hectare of rape. - Sphere VS

Find the surface and volume of a sphere that has a radius of 2 dm. - Basen

How many square meters of tiles we need to tile the walls and floor of the pool 15 meters long, six meters wide and two meters?deep - Garden

The garden around the new majer is divided as follows: 35% vegetable, 30% fruit orchards, 10% flowers and the remaining 120 m^{2}are lawns. What is the total area of the garden? - Combine / add term

Combine like terms 4c+c-7c - Sewing

The lady cut off one half of cloth. She needed three-quarters of this piece to sew a skirt. What part of the original piece of cloth still remained? - Seeds 2

How many seeds germinated from 1000 pcs, when 23% no emergence? - Drawer

The rectangular face of a drawer has a perimeter of 108 cm and a width of 18cm. Find the length and the area of the rectangular face of the drawer. - Iron

Iron ore contains 57% iron. How much ore is needed to produce 20 tons of iron? - Farmland

Farmers seeded maize to 45 ha, which is 15% of their total farmland. How many hectares of fields they have? - Obtuse angle

Which obtuse angle is creating clocks at 17:00? - Class

In 7.C clss are 10 girls and 20 boys. Yesterday was missing 20% of girls and 50% boys. What percentage of students missing?