Mass + system of equations - practice problems - page 9 of 10
Number of problems found: 188
- Weights
Marry and John together, weighing 49 kg. Their weights are in a ratio of 1:6. Determine their weights. - Barrel 4
The barrel of water weighs 63 kg. After off 75% water, the barrel's weight with water is 21 kg. How many kg weigh empty barrels and how many kgs of water in them? - Cork and swimming
If a person weighs 80 kg, how many kilograms of cork must take a swimming belt to float on water? The density of the human body is 1050 kg/m3, and the cork is 300 kg/m³. (Instructions: Let the human body and cork on a mixture with a density of - Construction 2449
The construction material was taken away by three different large cars. The weight of the load on the second was 20% more than on the first. The weight on the third was 20% more than on the second. They loaded a total of 18.2 tons. How many tons were on e
- Coffee
Coffee merchant has coffee robusta and arabica species. 1 kg Robusta is worth 450 CZK, Arabica 1 kg is 300 CZK more expensive. Calculate how many kilograms of Robusta and Arabica will need to produce 30 kg of the mixture so that the mixture costs 490 CZK - Coal storage
The coal storage distribution received coal shipment within three days. On the first day, distribute a third of the shipments, on the second day of two-fifths of the rest, and on the third day, 300 tons of coal. How many tons of coal were distributed firs - Children
Margaret and Zdena weigh the same and Petra 3 kg more. Together weigh 156 kg. How much do they weigh? - Alcohol mixing
How much 55% alcohol must we pour into 1500 g 80% alcohol to form a 60% alcohol? How much is 60% alcohol created? - Spirit
From 55% and 80% spirit, we would like to produce 0.2 kg of 60% spirit. How many of them must we use in a solution?
- Container with water
The weight of a container with water is 2.48 kg. Suppose the cast is 75% water, and the container with water weighs 0.98 kg. Determine the weight of the empty container. How much water was originally in the container? - Crates 2
In six crates is 45 kg of apples Five crates are equally apples. In the first crate is 3 kg more apples. How many kilograms are in each crate? - Water container
The container with water weighs 1.48 kg when we cast 75% of the water content of water weight 0.73 kg. How heavy is an empty container? - Coffee shop
The coffee shop brought two types of coffee total of 50 kg. The first type was CZK 220 per kilogram, and the second type was 300 CZK per 1 kg. All the coffee traders earned CZK 12,000. How many kilograms of coffee of the first type and how many kilograms - Tea blend
Tea blends are made from two kinds of tea. In standard tea, the mixture is two teas in the ratio of 1:3, and 40 g costs 42 CZK. In the premium tea mixture, weighing two teas in the ratio of 1:1 and 50 grams costs 60 CZK. How much cost 10 grams of a more e
- Metal alloy
What is the metal ratio in the alloy in the 50 tonnes of steel to 30 kg nickel? - Barrel 3
Barrel with water weights 118 kg. When we get off 75% of water, it weighs 35 kg. How many kg has an empty barrel? - The farmer
The farmer harvested 840 tons of grain in 2006, 44% less than in 2005 and one-fifth more than in 2004. How many tons of grain were harvested in the years 2005 and 2004? - Cargo
The weight of the cargo car is 761 kg. The car's weight is 23% of the total weight of the car+cargo. What is the weight of the cargo load? - Bob and Bobek
Bobek has two cabbages and five carrots. Bob has two cabbages and nine carrots. When Bobek stepped on the scale weight 5800 g, and Bob weighed 8960 g. Actual Bob weight is 8 kg and Bobek 5 kg. How much weighs one carrot?
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