The image formed by a concave mirror is twice the size of the object. The focal length of the mirror is 20 cm. The distance of the object from the mirror `is//are`

The image (of a real object) formed by a concave mirror is twice the size of the object. The focal length of the mirror is 20cm. The distance of the object from the mirror is:

The image formed by a convec mirror of focal length 30 cm is a quarter the size of the object what is the distance of the obect from the mirror?

A concave mirror of focal length f produces a real image n times the size of the object. The distance of the object from the mirror is

The image formed by a convex mirror of focal length 30 cm . is a quarter of the object. What is the distance of the object from the mirror ?

The image formed by a convex mirror of focal length 30 cm . is a quarter of the object. What is the distance of the object from the mirror ?

The image formed by a convex mirror of focal length 20 cm is a quarter of the object. What is the distance of the object from the mirror?