Direct proportionality - practice problems - page 4 of 38
Number of problems found: 741
- Shadow - an observation tower
How tall is an observation tower if it casts a shadow 9.6 m long at the exact same moment that a half-metre pole casts a shadow 30 cm long? - Two-kilogram bread
Farmers harvested 3,000 kg of rye from one hectare, from which they obtained 2,500 kg of flour. From 3 kg of flour, 4 kg of bread can be made. Calculate how many m² of land were needed to grow the rye required for one 2-kilogram loaf of bread. - Wrench Lever Force
The key works like a lever, where one arm is the radius of the bolt, and the other is the length of the key. If key no. 12 (for screws with a diameter of 12 mm) and a length of 12 cm can be tightened with a maximum force of 100 N, what force does the wren - Buy and sell
The selling price is 5.75 EUR, and the buying price is 4 EUR. By what percentage was the price increased? - The balance - the lever
For the lever to be balanced, the arms' lengths must be inversely proportional to the weight ratio of the weights suspended on these arms. Complete the data: 30 cm, 10 cm, 4 kg, and m2 kg. - Seedling distance reduction
If you plant seedlings in the bed at a distance of 20 cm, 40 will fit here. How many seedlings will fit here if you reduce the distance between them to 15 cm? - Train speed calculation
The train covers the distance between two stations at a 60 km/h speed in 4.5 hours. How long would the trip take if the train could travel at a speed of 75 km/h? - Wheel load force
A working load weighing 50 kg is placed on the wheel at a distance of 50 cm from the axis of rotation. Calculate the force required to lift the wheel. Hansel lifts the wheel at a distance of 1.5 meters from the axis of rotation. The weight of the wheel is - Meat price kilograms
3 kg of meat costs €8.10. How many kg of meat can we buy for €27? - Machine container filling
Two filling machines fill 250 containers in 2 hours. How many containers will 4 machines fill in 3 hours? - Part-timer
Seven part-timers paint 280 m of railings in 5 hours. How many meters of railing will nine part-timers paint in 4 hours? - Maid bed making
Six maids in a hotel make 200 beds in 2 hours. Calculate how long five equally efficient maids would take to make these beds. Enter the result in minutes. Calculate how long three equally efficient maids would take to make 100 identical beds. Express the - Wheat harvest hectare
Farmers harvested 1110q of grain from 37 hectares of wheat. a) how many q of wheat did they harvest from 12 hectares? b) how many grains were harvested from 1 m². C) how big is the side of the square of the field from which they harvested 1q of wheat? - Minute hand angle
The minute hand describes an angle of 180 degrees in half an hour. In how many minutes does the minute hand cover an angle of 192 degrees? - Cow water consumption
Fifty cows drink 2500 liters of water per day. How much water will 24 cows drink? - Femur person height
The length of the femur makes up 27% of a person's height. If the femur is 46.75 cm long, how tall is a person? - Sand sieve coarse
At the construction site, the sand that belongs to the mortar is sifted through a sieve. At the same time, 1/6 of the coarse sand falls through. Determine how many m³ of sand must be brought in to obtain 2 m³ of sifted sand. - Lesson hour conversion
I have 38 lessons that last 70 minutes. How many teaching hours are there in terms of 45-minute lessons? - Snowman column shadow
Near the lamppost, the children built a 1.65 m tall snowman. The snowman's shadow is 135 cm long. The shadow of the lamppost is 4.05 m. How tall is the lamppost? - Gasoline comsuption
In 24 hours, the engine consumes 346 I of gasoline. How many liters does it consume in 126 hours of operation?
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