Maths practice for 12-year-olds - page 289 of 300
Examples and word math problems for 7th grade.Number of problems found: 6000
- Diagonal
Calculate the diagonal length of the rectangle ABCD with sides a = 8 cm, b = 7 cm. - Trapezium
Find the height of the trapezium ABCD, which has an area 87.5 cm² and base lengths 15 cm and 10 cm. - Madams
During spring cleaning, ladies were going to wash the windows. Mother takes 5 hours to wash all the windows, the grandmother takes 3 times longer, and Paula washes all the windows in 2 hours. How many hours will you spend washing the windows of this "wome - Car
The car goes from point A to point B at speed 84 km/h and back 67 km/h. If it goes there and back at speed 77 km/h trip would take 20 minutes shorter. What is the distance between points A and B?
- Medicament
Many manufacturers produce the same type of medicament in various packages with different active substance content. Pack 1: includes 60 pills of 600 mg of active substance per pack cost 31.5 Eur. Pack 2: includes 100 tablets of 1200 mg of active substance - Train
A passenger train traveled for 2 hours 74 km. 3.1 hours after its departure started fast train and caught it on 186 km. How many km/h is different from its average speed? - Quadrant II
Calculate the radius of the quadrant, which area is equal to the area of the circle with radius r = 15 cm. - Coin and die
Flip a coin and then roll a six-sided die. How many possible combinations are there? - Inheritance
After death, the father (♱ 54) remained the mother (his wife) and 5 children. Inheritance by law is that the first mother will automatically get half of the property and the other half inherited by heirs, the mother and her 5 children by the same share. C
- Tiles
How many 37 cm square tiles will cover a floor 11.84 m by 17.39 m? - Count of roots
How many solutions have equation x * y = 7757 with two unknowns on the set of natural numbers? - Efficiency
A certain device consumes 28 kW and delivers 14 kW. Find its efficiency. - Base
Compute the base of an isosceles triangle, with the arm a=20 cm and a height above the base h=10 cm. - Homework - jumps
Sasha jumped 131 cm Peter 4 cm more than Jirka. Jirka 6 cm less than Misha. Misha 7 cm less than Filip, and Filip is half as much as Sasha and Petr together. How far does each jump?
- Road embankment
Road embankment has a cross-section shape of an isosceles trapezoid with bases 5 m and 7 m and 2 m long leg. How many cubic meters of soil is in an embankment length of 1474 meters? - IS trapezoid
Isosceles trapezoid arm measured 35 cm. Height is 30 cm, and the middle segment is 65 cm. Find the length of its bases. - Bridge
The bridge arc has a span of 159 m and a height of 14 m. Calculate the radius of the circle arc of this bridge. - The circle arc
Calculate the span of the arc, which is part of a circle with diameter d = 11 m and its height is 5 m. - 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 climb 2.8 ‰. Calculate the height difference between two points on the railway distant 5997 meters.Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
