Circle - practice for 12 year olds - page 9 of 16
Number of problems found: 311
- Wheel
The diameter of the motorcycle wheel is 52 cm. How many times rotates the wheel on the road long 2 km? - Diameter 6348
How many m did a wheel with a diameter of 22dm pass if it stopped after 30 turns? - Sprinkler 48513
The rotary sprinkler has a spray of 20 m. What area of land can it irrigate from one place? - Clocks
The length of the minute hand is 12 cm. What track in meters will its endpoint describe in a week?
- Wheel
What is the wheel diameter if the 0.57 km track turns 106 times? - Determine 19953
The distance between the tip of the minute hand and the center of the dial is 12 mm. Determine the distance traveled by the tip in 45 min. (draw a clock face and a minute hand and realize the distance it will cover in 45 min.) - Clock
How long is the trajectory of the second hand of hours for day, if it is 15 mm long? - Half-circles 81731
A skier skis down a black slope. He makes a total of 31 half-circles while going down the hill. The radius of one semicircle is 4m. What distance did he travel? - Flowerbed
The park has a large circular flowerbed with a diameter of 12 m. Jakub circulated him ten times and the shorter Vojto seven times. How many meters each went by, and how many meters did Jakub run more than Vojta?
- Circular base
Find the radius of the circular base of the vessel, whose perimeter is 2.51 m. Write the result to one decimal place in meters. Via the π sign - Ludolph's number - Athlete
How long length an athlete run when the track is a circular shape radius of 120 meters, and an athlete runs five times in the circuit? - Rectangle and circle
The rectangle ABCD has side lengths a = 40 mm and b = 30 mm and is circumscribed by a circle k. Calculate approximately how many centimeters a circle is long. - Pizza
Pizza with a diameter of 50 cm weights 559 g. What diameter will a pizza weigh 855 g made from the same cloth (same thickness) and decorated? - Diameter 46141
The road roller has a diameter of 1.4 m and a length of 160 cm (a) how many square meters the road rolls when it turns 95 times b) how many times does it turn when rolling a 3 km-long section
- Diameter
The diameter of a circular plot is 14 dm. Find the circumference and area. - Cross-section 82544
A water spray nozzle with a cross-section of 1.5 cm² sprays water at a speed of 24 m/s. What is the speed of the current in the supply pipe whose cross-section has a volume of 18 cm²? - Distance 22043
There is a given circle k (S, 4 cm) and a line p. If the distance of point S from line p is less than 4 cm, is the line p called? - What is
What is the height of a cylinder whose surface size is 602.88 cm² and the area of its shell is 376.8 cm²? - The Earth
The Earth's surface is 510,000,000 km². Calculates the radius, equator length, and volume of the Earth, assuming the Earth has the shape of a sphere.
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