The radius of the circle is 14 m. Find the radius of another circle whose area is one. fourth of the area of pervious circle.

Find the perimeter of the circle whose area is 6.16 cm^2 .

The adjoining figure shows two circles with the same centre. The radius of the larger circle is 10 cm and the radius of the smaller circle is 4 cm(a) the area of the larger circle (b) the area of the smaller circle (c) the shaded area between the two circles. ( pi = 3.14)

The area of a circle is 1386 cm^2 . Find the circumference of the circle.

Find the area of circle whose radius is 25 m

In the fig. fourth quadrant of a circle is OACB where O is the centre of the circle and radius of the circle is 3.5 cm. Find the area of fourth quadrant of the circle.and find the area of shaded portion of the part ADBC if OD=2cm (pi=22/7)

The diameters of two circles are in the ratio of 4 : 3and the sum of the their areas is equal to the area of the circle, whose radius is 5 cm. Find the diameters of the two circles.