EASY
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The length of boundary of a circle is called its _____.  circumference / Area / sector

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Important Questions on Basic Geometrical Ideas

MEDIUM
Mathematics>Geometry>Basic Geometrical Ideas>Circles

The wheels of a car are of diameter 80 cm each. How many complete revolutions does each wheel make in 10 minutes when the car is traveling at a speed of 66 km per hour? use π=227

EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
Write the perimeter of semicircle of radius r.
EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
If the ratio of the area of two circles is 9:16, then the ratio of their circumference _____.
EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
A rhombus has the same perimeter as the circumference of a circle. If each side of the rhombus measures 33 cm, find the radius of the circle.
EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
The circumference of a circle exceeds its diameter by 30 cm. Find the radius of the circle.
MEDIUM
Mathematics>Geometry>Basic Geometrical Ideas>Circles
Find the distance covered by the wheel of a car in 500 revolutions if the diameter of the wheel is 77 cm.
MEDIUM
Mathematics>Geometry>Basic Geometrical Ideas>Circles
If the perimeter of a circle is equal to that of a square the ratio of their areas is
EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
The diameter of the wheel of a car is 77 cm. How many revolutions will it make to travel 121 km?
HARD
Mathematics>Geometry>Basic Geometrical Ideas>Circles
If the circumference of a circular sheet is 154 m, find its radius. Also find the area of the sheet. (Take π=227)
EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
Find the circumference of a circle whose diameter is

(i) 35 cm.
(ii) 4.9 m.
EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
How long will a man take to make a round of a circular field of radius 21 m, cycling at the speed of 8 km/h?
MEDIUM
Mathematics>Geometry>Basic Geometrical Ideas>Circles
One circle has radius of 98 cm and a second concentric circle has a radius of 1 m 26 cm. How much longer is the circumference of the second circle than that of the first?
EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
The diameter of a wheel of a car is 77 cm. Find the distance covered by the wheel in 500 revolutions.
EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
The hour and minute hands of a clock are 4.2 cm and 7 cm long respectively. Find the sum of the distances covered by their tips in 1 day.
MEDIUM
Mathematics>Geometry>Basic Geometrical Ideas>Circles

Find the circumference of the inner and the outer circles, shown in the adjoining figure. (Take π=3.14)

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MEDIUM
Mathematics>Geometry>Basic Geometrical Ideas>Circles
Saima wants to put a lace on the edge of a circular table cover of diameter 1.5 m. Find the length of the lace required and also find its cost if one meter of the lace costs ₹15. (Take π=3.14)
MEDIUM
Mathematics>Geometry>Basic Geometrical Ideas>Circles
A piece of wire is bent in the shape of an equilateral triangle each of whose sides measures 8.8 cm. This wire is rebent to form a circular ring. What is the diameter of the ring?
EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
The inner circumference of a circular track is 330 m. The track is 10.5 m wide everywhere. Calculate the cost of putting up a fence along the outer circle at the rate of Rs 20 per metre.
EASY
Mathematics>Geometry>Basic Geometrical Ideas>Circles
Find the circumference of a circle whose radius is

(i) 28 cm.
(ii) 1.4 m.
MEDIUM
Mathematics>Geometry>Basic Geometrical Ideas>Circles
A wheel has diameter 84cm. The number of complete revolution it will take to cover 792m is