Expression of a variable from the formula - practice for 12 year olds - page 14 of 35
Number of problems found: 691
- Pineapples 33061
We can exchange three bananas for four oranges in a barter shop, and nine bananas are obtained for four pineapples. How many oranges do we get for one pineapple? - Proportion 32471
The lengths of the sides of the two squares are in the ratio of 5:7. In what proportion their area will be? - Students 32361
Seven of the 28 pupils cannot ski, and x pupils cannot swim. How many students in this class can swim? - Calculate 32011
Calculate the size of the BVC angle if the following applies to the size of the angles: AVB = 37 ° 48 minutes, CVD = 52 ° 30 minutes, AVD = 118 °
- Six painters
Six painters paint an area of 120 m² in 4 hours. How long does it take for 12 painters to paint 480 m² with the same performance? - Workers 31841
Twelve workers earned 2,000 euros in 10 days. How many workers would 14 workers earn in 8 days? - Train tons
The entire loaded train weighs 760 tons. It has 30 wagons, each carrying 12 tons of grain and empty, weighing 10 tons. What is the weight of the locomotive? - Cube edges
The cube has an edge of 4 cm. It has the same volume as a block, the base of which has an area of 32 cm². What height is the block? - Running
The length of the inner edge of the running oval is 400 m. The straight sections measure 90 m. Calculate the dimensions of the oval - the rectangle where this oval can fit.
- Edge c
Find the edge c of the cuboid if an edge a = 20 mm, b = 30 mm and surface area S = 8000 mm². - Circumference 30761
There is 0.3 dl of strawberry ice cream in the cone-shaped ice cream cone. Calculate the depth of the cornet if its circumference is 5.6 cm. - Cube V2S
The volume of the cube is 27 dm cubic. Calculate the surface of the cube. - Millimeter 30041
Calculate the length of the wall diagonal of a cube with a volume of 7.40 dm cubic. Express the result to the nearest millimeter. - Thousand balls
We must create a thousand balls from a sphere with a diameter of 1 m. What will be their radius?
- Vertical 29801
The shadow of the building is 16 m long, and the shadow of the vertical meter rod is 0.8 m long at the same time. What is the height of the building? - Volume of sphere
How many times does the volume of a sphere increase if its radius increases two times? - Cylindrical tank
9.6 hl of water is poured into a cylindrical tank with a bottom diameter of 1.2 m. What height in centimeters does the water reach? - The string
They cut 113 cm from the string and divided the rest in a ratio of 5:6.5:8:9.5. The longest part measured 38 cm. Find the original length of the string. - Height
The area of the triangle is 35 cm². The length of the base is 10 cm. Determine the length of the height on the base.
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