# Unit conversion - examples - page 19

1. Square glass
What is the area of the square window glass with the side 4 dm? Do you know how many cm2 is it?
2. Acres
Two hours 24 students harvested chestnuts on 36 acres. How many square meters harvested one student per hour?
3. Cylindrical tank
Cylindrical tank holds 600hl water and is deep 2.5 m. Calculate the diameter of the cylinder.
4. Bronze medal
To produce 1 kg of bronze must be 0.95 kg copper, 0.04 kg of tin, 0.01 kg zinc. The bronze medal has a weight of 8.5 g. How much copper, tin and zinc does medal have?
5. Three cubes
The body was created by gluing three identical cubes. Its volume is 192 cm3. What is its surface in dm2?
6. One deci
Wine 0,375 l costs 2040 CZK. How much does 1 dl cost?
7. Raw meat
In the school cafeteria for one lunch, they prepare 490 servings of 50 g of boiled meat. Meat loses 30% of its weight by cooking. How many kilograms of raw meat must the school canteen prepare for this lunch to cook?
8. Walkers
Walker, which makes 120 steps per minute, make distance from point A to point B for 55 minutes. The length of his step is 75cm. For how long does this distance go boy who will do 110 steps 60 cm long in a minute?
9. Parallelogram perimeter
The ABC triangle with sides a = 5cm, b = 3cm, c = 40mm has the center of the sides of the K,L,M. How many cm have the KBLM parallelogram perimeter?
10. The terrace
Around the round pool with a diameter of 5.5 meters is a wooden terrace with a width of 130 cm. What is the area of the terrace?
11. Quarters
How many meters is a quarter of a kilometer? How many centimeters is a quarter of a meter, how many cents is a quarter of the euro?
12. Thunder and lightning
There was a glimpse of the sky and we hear a thunder in 4.5 seconds. The light spreads at 300,000 kilometers per second, so we can assume the flash instantly without delay. However, the speed of the sound is much smaller in the air one third of a kilomete
13. Two cuboids
Find the volume of cuboidal box whose one edge is: a) 1.4m and b) 2.1dm
14. Rainfall
How many liters of water did fell in a 32m long and 8m wide garden, if 8mm of rain fell?
15. Fence and scale
The garden with 80 m of fencing is draw on plan as a square with a side length of 4 cm. At what scale is this plan made?
16. Cubes into cuboid
How many 12 centimeter cubes fit into the block (cuboid) with 6dm, 8,4dm and 4,8?
17. Hours
The lesson lasts 45 minutes. For the week, students have 18 lesson hours. How many are the actual hours?
18. Diamond
The diamond has a circumference of 48cm. Calculate the length of its side in dm.