The radius of a circle is stated as 2.12 cm. Its area should be written as

The radius of a circle is 7 cm. Find its area

The radius of a circle is 7 cm. Find its area

Find the area of a circle of radius 4.2 cm

If the radius of a circle is 21 cm then area of the circle is

The radius of a circle is 14 cm.If the area of a sector of the circle is 102.7cm^2 ,then find the angle made by the sector at its centre.

If the radius of a circle is increasing at the rate of 2 cm/ sec, then the area of the circle when its radius is 20 cm is increasing at the rate of

The radii of two circles are 5 cm and 12 cm. The area of a third circle is equal to the sum of the area of the two circles. The radius of the third circle is :

The radii of two circles are 5 cm and 12 cm. The area of a third circle is equal to the sum of the areas of the two circles. The radius of the third circle is :

The radius of a circle is increasing at a rate of 2.5 cm/sec. Find the rate of increase of the area of the circle when its radius is 5cm.