The area of a circle is increased by 22 `c m^2` when its radius is increased by 1 cm. The original radius of the circle is (a)6 cm (b) 3 cm (c)4 cm (d) 3.5 cm

The area of a circle is increased by 22 cm' when its radius is increased by 1 cm. The original radius of the circle is

The area of a circle is increased by 22 cm^2 its radius is increased by 1 cm. The original radius of the circle is

The area of a circle is increased by 22cm^(2) when its radius is increased by 1cm. The original radius of the circle is 6cm(b)3cm4cm(d)3.5cm

If the radius of a sphere is increased by 2cm, then its surface area increases by 352cm2. The radius of the sphere before the increase was (a) 3cm (b) 4cm (c) 5cm

Find the area of a circle with radius 3.5 cm.

A triangle with sides 13cm,14cm and 15cm is inscribed in a circle.The radius of the circle is (a) 2cm (b) 3cm (c) 4cm (d) 8.125cm

If the area of a sector of a circle bounded by an arc of length 5pi cm is equal to 20pi\ c m^2 , then the radius of the circle is (a) 12 cm (b) 16 cm (c) 8 cm (d) 10 cm

If the area of a sector of a circle bounded by an arc of length 5pi cm is equal to 20pi\ c m^2 , then the radius of the circle is (a) 12 cm (b) 16 cm (c) 8 cm (d) 10 cm

The diameter of a circle is increasing at the rate of 1 cm/sec. When its radius is pi , the rate of increase of its area, is