Mass - practice for 13 year olds - page 26 of 27
Number of problems found: 525
- Mushrooms
Fresh mushrooms contain 94% water and dried 11%. How many kilograms of fresh mushrooms are needed to collect to get 8 kg dried? - Metallurgical enterprise
Metallurgical company daily produces 318 tons of cast iron. How many tons of coke does it burns to melt cast iron when 10 tons of cast consumes 6 tons of coke? - Lorry
The lorry was loaded with 18 boxes of 15 kg. How many boxes with weight 18 kg can be loaded if the total load must be the same? - Lid
What is the weight of the concrete cover (lid) to round shape well with a diameter 1.8 m if the thickness of the cover is 11 cm? 1 m³ of concrete weighs 2190 kg.
- Bakery
How heavy must prepare bread at a bakery if a bread loses 18% of water during baking and after baking must have 1.7 kg? (Calculate to the nearest gram) - Retail
At what price bought the retail 1 kg goods from wholesale if lost in the distribution is 4% of the weight of the goods, and retail still have a profit of 6.3%? Goods are sold at retail for 25 euro per kg. - Tare
The gross weight of a shipment is 6927 kg, and its tare is 7%. Calculate the net weight of the shipment. - Sea water
Mixing 62 kg of seawater with 84 kg rainwater is created water containing 3.1% salt. How much percent of seawater contains salt? - Coffee
In-stock are three kinds of branded coffee prices: I. Kind. .. .. .205 Kc/kg II. Kind. .. .. .274 Kc/kg III. Kind. .. .. 168 Kc/kg Mixing these three species in the ratio 8:5:6 create a mixture. What will be the price of 100 grams of this mixture?
- Beer
After three 10° beers consumed in a short time, there is 5.6 g of alcohol in 6 kg adult human blood. How much is it per mille? - Balance
The rod is 1.9 m long hanging weights 4 kg and 1 kg on ends. Where is the center of the rod (distance from weight 4 kg) to be in balance? - Wheat
The rectangle-shaped field with dimensions 1268 m and 745 m harvested last year was 4959 q wheat. (1 q = 1 quintal = 100 kg). During the year, it was necessary to fix the pipe and therefore did kick wide 4 m parallel to the side of the field 745 m, were n - Blood
In the human body, the blood is about 7.3% body weight. How many kilograms of blood are in the human body with a weight of 109 kg? - Cube
The cube weighs 11 kg. How weight is a cube of the same material if its dimensions are 3-times smaller?
- Sphere
The sphere's surface is 12100 cm², and the weight is 136 kg. What is its density? - Lead cube
Calculate the cube's edge made from lead, which weighs 19 kg. The density of lead is 11341 kg/m³. - Pump
What power does a pump output to move 4853 hl of water to a height of 31 m for 8 hours? - Carbon dioxide
Calculate how many grams of oxygen are in 50 g of carbon dioxide CO2. The relative atomic mass of oxygen is 16 and of carbon is 12. - Air mass
What is the weight of the air in a classroom with dimensions 10 m × 10 m × 2.7 m? The air density is 1.293 kg/m³.
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