Perimeter of Circle Problems - page 5 of 15
Number of problems found: 287
- Bicycle wheel
A bicycle wheel has a diameter of 62 cm. How many times does it rotate over a 1 km road? - Odometer
The odometer is driven by the wheel's rotation, which has a diameter of 65 cm. After how many rotations does the wheel turn counter to the next kilometer? - Velocipede
The front wheel of the velocipede from the year 1880 had a diameter of 1.8 m. Suppose the front wheel is turned again once, then the rear wheel six times. What was the diameter of the rear wheel? - Mining wheel descent
The mining tower's wheel has a diameter of 150 cm. If the wheel turns in the same direction seventy times, how many m will the elevator cage descend? - Field circle diameter
A field is shaped like a circle. If John wants to run 800 m, he has to go around the field 2.5 times. Determine the diameter of the field, rounded to the nearest whole meter. - Dodecagon
Find the area of a regular dodecagon (n=12) if the radius of the circumscribed circle is 5 cm. - Circle diameter
Calculate the diameter of a circle whose area in cm² and the circumference in cm are expressed by the same 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? - Well
A rope with a bucket is fixed on the shaft with the wheel. The shaft has a diameter of 45 cm. How many meters will drop bucket when the wheels turn 7 times? - Sector
The perimeter of a circular sector with an angle 0.7 rad is 53 cm. Determine the radius of the circle from which the sector comes. - Silo
The outer perimeter of the silo is 10 m. The concrete wall is 13 cm thick. What is the diameter and area of the inside floor of the silo? - Quarter circular
The wire hooked around the perimeter of the quarter-circular arc has a length of 14π+56. Determine the radius of the circle arc. - Wheel circumference
The circumference of the first wheel is 0.5 m larger than the circumference of the second wheel. The first wheel turns on the 36 m track as many times as the second on the 30 m track. Determine the rims of both wheels. - Circles
Three circles with radii 30 cm, 28 cm, and 37 cm are mutually tangent externally. What is the perimeter of the triangle whose vertices are the centres of the circles? - Bicycle wheel
What is the diameter in centimeters of the wheel of a bicycle if it turns 2000 times on a track 4082 m long - Skier semicircle distance
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 4 m. What distance did he travel? - Round table
The round table has a diameter of 78 cm. A tablecloth should be sewn on it, extending around the table by 10 cm. How many centimeters of ribbons need to be bought for edging? - Circumference - bed
The perimeter of the round bed is 36 m. Find the length of the part of its circumference that belongs to the given center angles of 180° - Circle circumference calculation
Calculates the circumference of a circle if its area is S = 2119.5 cm². - Two gears
The two gears fit together. The larger gear has 32 teeth. The smaller gear has 20 teeth fewer. How many times does turn a smaller gear if the bigger gear turns three times?
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