The area of a circle is 38.5 sq. cm. Its circumference is
The area of the square that can be inscribed in a circle of radius 12 cm is
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If the area of a circle is equal to the area of a square, then the ratio of their perimeters is
A piece of wire 20cm long is bent into the form of an arc of a circle subtending an angle of 60 at its centre. The radius of the circle is
The area of a sector of a circle with radius 21cm and sector angle 120^{∘} is
The circumference of a circle whose diameter is 4.2cm is
The area of the circle that can be inscribed in a square of side 10cm is
The area of a square that can be inscribed in a circle of radius 10cm is
A square of side 7cmis inscribed in a circle. The area enclosed between the circle and the square is
The angle described b the minute hand between 4.00 pm and 4.25 pm is
The length of the wire is 66m. The number of circles of circumference 13.2cm can be made from the wire is
If the perimeter of a circle is equal to that of a square, then the ratio of their areas is
If the area and circumference of a circle are numerically equal, then its radius is
On a square handkerchief, nine circular designs each of radius 7cmare made. The area of the remaining portion of the handkerchief is
A horse is tied to a peg at one corner of a square shaped gross field of side 25m by means of a 14m long rope. The area of that part of the field in which the horse can graze is
The radius of a circle whose circumference is equal to the sum of the circumferences of the two circles of diameters 36cm and 20cm is
If the radius of a circle is increased by 100%, then its area is increased by
If the area of a circle is ‘A’, radius of the circle is ‘r’ and its circumference is ‘C’, then
A light house throws light forming sector of radius 21 m with central angle 120^{∘}. The area covered by it is
The circumference of a circle exceeds its diameter by 120cm, then its radius is
If the circumference of a circle and the perimeter of a square are equal, then
The area of a quadrant of a circle whose circumference is 88cm is
If a chord of a circle of radius14cm subtends a right angle at the centre of the circle, then the area of the sector is
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116 videos420 docs77 tests
