Length - practice for 12 year olds - page 57 of 63
Number of problems found: 1249
- Passenger car
A passenger car covers 1 km in 2/3 minutes, and a truck in 50 seconds longer. How much slower is the speed of the truck? - Clocks
How long does the track travel the second hand of a clock in 30 hours, which is 4 cm long? - Scale 3
Miriam's room is 3.2 meters wide. It is drawn by a line segment length of 6.4 cm on the floor plan. On what scale is the plan of the room? - Jumps
At least how many jumps must a frog do to overcome the distance of 7 meters? The jump of a frog is 18 cm long.
- Remainder 1634
The work crew will excavate 1/4 of the channel on the 1st day, and 1/2 of the remainder on the 2nd day. Third day 1/3 of what she dug the second day. What part of the canal in km still needs to be dug after the third day, if the length of the canal is 72 - Greenhouse
The Garden plastic greenhouse is shaped half-cylinder with a diameter of 6 m and a base length of 20 m. At least how many m² of plastic is needed for its cover? - Medians in triangle
The median of the isosceles triangle has a length of 3 cm. Determine the size of its sides if its perimeter is 16 cm. - Measures 1576
Katy, whose step measures 50 cm, counted 294 steps from her house to her aunt's. How many steps will Katy's father take on the way to his aunt if his step measures 70 cm? - Square and circle
Into the square is an inscribed circle with a diameter of 10 cm. What is the difference between circumference square and circle?
- Minute-hand
How long will a large (minute) hand travel on the clock for 48 minutes if its length is 56 cm? - Plumber
The plumber had to cut the metal strip with dimensions of 380 cm and 60 cm to the largest squares to no waste. Calculate the length of the sides of a square. How many squares cut it? - Weight of air
What is the weight of air in the living room measuring width 8 m, length 5 m, and height 3.1 m? Air density is ρ = 1.2959 kg/m³. - Train from Prague
The first train from Prague started at 8:00 hour at 40 kilometers per hour. Train from Ostrava started at 9:20 at 80 km per hour. How many hours and how far from cities with trains meet if the distance of cities is 400 km. - Train from Brno
The first train started from Brno at 8 AM at 60 km per hour. The second train started from Opava at 7 o'clock at the speed of 40 kilometers per hour. In how many hours and how far from cities trains meet when the distance of cities is 200 kilometers.
- Seamstress
The seamstress bought two kinds of textile together 25 meters. One at 50 SKK and the second at 70 SKK per meter. How many meters were purchased from these two textiles when paid 1540 SKK? - Plan scale
At what scale is the drawn plan of the building, where one side is 45 meters long, on the plan expressed by a straight line 12 mm long? - Sisters
Sisters Hanka and Vera go mostly to their grandmother by bicycle. Journey took Hanka 30 minutes and Vera 20 minutes. How long will Vera catch up with Hanka when she starts from home five minutes later than Hanka? - Do you solve this?
Determine area S of a rectangle and the length of its sides if its perimeter is 102 cm. - Car consumption
The car has consumption 7.3 l/100 km. How much money will it cost to ride 330 km in long if the diesel price is 1.63 USD/l?
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