A spherical mirror forms an erect image three times the size of the object if the distance between the object and the image is 80 cm, the nature and the focal length of the mirror are

A spherrical mirror forms an erect image three times the size of the object, If the distance between the object and the inage is 80 cm. The nature and the focal length of the mirror are

A spherrical mirror forms an erect image three times the size of the object, If the distance between the object and the inage is 80 cm. The nature and the focal length of the mirror are

A spherical mirror forms a real image three times the linear size of the object. If the distance between the object and the image is 80 cm, the focal length of the mirror is

A lens of focal length 12 cm forms an upright image three times the size of a real object. Find the distance in cm between the object and image.

A lens of focal length 12 cm forms an upright image three times the size of a real object. Find the distance in cm between the object and image.

A spherical mirror gives real image 3 times greater than object. If distance between object and image is 100 cm, then its focal length is

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