# 5th grade (10y) + expression of a variable from formula - problems

1. Theater
The theater has in each row with 19 seats. Ticket to the first 10 rows is for 30 USD. In next rows is for 15 USD. The theater was completely sold out. Revenue was 12255 USD. How many rows are in the theater?
2. Playground
Rectangular playground is fenced with 38 m long netting. Its width is 7 m. Calculate its length.
3. Floor
Rectangular floor of living room has a length 5.4 meters and a circumference 17.2 meters. What is its width?
4. MO-Z5-3-66 tiles
The picture shows a square tiles with side 10 dm which is composed of four identical small rectangles and squares. Circumference of small square is five times smaller than the circumference of the entire tile. Determine the dimensions of the rectangle.
5. Value
Determine the value of the following exspressions: a) (23-25)·(4-5) b) (97-123):(18+8)
6. Fence
Square garden has an area of 537 m2. How many meters netting is necessary to fence the garden?
7. Perimeter from area
What is the perimeter of the square if its content is 64 cm2?
8. Apples 5
In six crates are 45 kg of apples. In five crates were the same amounth and in one crate was 3 kg of apples more. How many kg of apples were in each crate?
9. Euros
Peter spent a quarter of his pocket saving. He has 9 euros now in his wallet . How many euros spent?
10. Wine
A bottle of wine costs 21 euros; and wine is 20 times more expensive than a bottle. How much a bottle cost?
11. Eggs
3400 eggs sliced hens for February and March. We have to calculate how many hens can make 3400 eggs when one hen give 2 eggs a day for 59 days.