If increasing the radius of a circle by 1 unit doubles its area, then its original radius is-

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

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

If the radius of a circle is in creased by 50%, its area is increased by:

If the radius of a circle is in creased by 50%, its area is increased by

If the radius of a circle is increased by 6%, then its area will increase by

Find the area of the circle if its radius is 2.1 m.

Increasing the radius of a cylinder by 6 units increases the volume by y cubic units. Increasing the altitude of the cylinders by 6 units also increases the volume by y cubic units. If the original altitude is 2, then the original radius is ?