The area of a circle is 38.5 cm². The circumference of the circle is

The area of a circle is 49π cm². Its circumference is

The difference between the circumference and radius of a circle is 37 cm. The area of the circle is

The perimeter of a circular field is 242 m. The area of the field is

On increasing the diameter of a circle by 40%, its area will be increased by

On decreasing the radius of a circle by 30%, its area is decreased by

The area of a square is the same as the area of a circle. Their perimeters are in the ratio

The circumference of a circle is equal to the sum of the circumferences of two circles having diameters 36 cm and 20 cm. The radius of the new circle is

The area of a circle is equal to the sum of the areas of two circles of radii 24 cm and 7 cm. The diameter of the new circle is

If the perimeter of a square is equal to the circumference of a circle then the ratio of their areas is

If the sum of the areas of two circles with radii R₁ and R₂ is equal to the area of a circle of radius R then

If the sum of the circumferences of two circles with radii R₁ and R₂ is equal to the circumference of a circle of radius R then

If the circumference of a circle and the perimeter of a square are equal then

The radii of two concentric circles are 19 cm and 16 cm respectively. The area of the ring enclosed by these circles is

The areas of two concentric circles are 1386 cm² and 962.5 cm². The width of the ring is

The circumferences of two circles are in the ratio 3 : 4. The ratio of their areas is

The areas of two circles are in the ratio 9: 4. The ratio of their circumferences is

The radius of a wheel is 0.25 m. How many revolutions will it make in covering 11 km?

The diameter of a wheel is 40 cm. How many revolutions will it make in covering 176 m?

In making 1000 revolutions, a wheel covers 88 km. The diameter of the wheel is

The area of a sector of angle θ° of a circle with radius R is

The length of an arc of a sector of angle θ° of a circle with radius R is

The length of the minute hand of a clock is 21 cm. The area swept by the minute hand in 10 minutes is

A chord of a circle of radius 10 cm subtends a right angle at the centre. The area of the minor segments (given, π = 3.14) is

In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. The length of the arc is

In a circle of radius 14 cm, an arc subtends an angle of 120° at the centre. If √3 = 1.73 then the area of the segment of the circle is