Maths practice for 12-year-olds - page 290 of 301
Examples and word math problems for 7th grade.Number of problems found: 6002
- 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) - Railways
Railways climb 2.8 ‰. Calculate the height difference between two points on the railway distant 5997 meters. - Tereza
The cube has an area of base 144 mm². Calculate the edge length, volume, and area of its surface. - Pool
Mr. Peter builds a pool in the garden in the shape of a four-sided prism with a rhombus base. The base edge length is 8 m, and the distance between the opposite walls of the pool is 7 m. The estimated depth is 144 cm. How many hectoliters of water does Mr
- Area of RT 2
Calculate the area of a right triangle whose legs have a length of 6.2 cm and 9.8 cm. - Pure quadratic equation
Solve pure quadratic equation -7x² +4 = 0. - LCM
What is the least common multiple of 5, 50, 14? - Task
I have homework. The cube's edge is 7 cm long, and I must find the diagonal between the wall and the body. - Paddlers
Students of canoeists traveled on a trip of three days 102 km. On the second day, they traveled 15% more than the first day and on the third day 9 km over the second day. How many kilometers are traveled each day?
- Saw
Imagine that the saw blade with a diameter 40 cm has one tooth colored with a different color. How long does the tooth's tip describe the path after 15 minutes if the blade is rotated 13365 times? - Cu wire
Copper wire has a length l = 820 m and diameter d = 10 mm. Calculate the weight if the density of copper is ρ = 8500 kg/m³. Please result round to one decimal place. - Beer
Which beer is better to drink: small beer (0.3 L) for 0.67 € or large (0.5 L) for 1.81 €? - Number
What number is 12 % smaller than the number 102? - Circle
What is the radius of the circle whose perimeter is 11 km?
- Silo
The outer perimeter of the silo is 32 m. The concrete wall is 35 cm thick. What is the diameter and area of the inside floor of the silo? - Hop-garden
The length of the rectangular hop garden Mr. Smith increased by 25% and its width by 30%. What is the percentage change in the area of the hop garden? - Divisibility
Determine the smallest integer which divided 11 gives remainder 4. When divided, 15 gives remainder 10 and when divided by 19 gives remainder 16. - Peleton
The cycling race was run at an average speed of 45 km/h. One cyclist lost with defect 8 minutes. How long and far must he go at speed 51 km/h to catch the peloton again? - Cyclist
A cyclist is moving at 35 km/h and follows a pedestrian walking at speed 4 km/h. The walker has an advantage 19 km. How long does it take a cyclist to catch up with him?
Are two right triangles similar if the first one has an acute angle 60° and the second one has an acute angle 30°?Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
