[" 10"mm" long bin is placed vertically in front of a concave mirror.A "5mm" long image of "],[" bin if formed at "30cm" infront of the mirror.The focal length of this mirror is "]

A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

An object is placed at a distance of 30 cm from a concave mirror and its real image is formed at a distance of 30 cm from the mirror. The focal length of the mirror is

An object is placed at a distance of 30 cm from a concave mirror and its real image is formed at a distance of 30 cm from the mirror. The focal length of the mirror is

The image of a distant object is formed at 30 cm from a concave mirror. What is the focal length of the mirror?

An object is placed at a distance of 25 cm from a concave mirror and a real image a formed by the mirror at a distance of 37.5 cm. The focal length of the mirror is

An object is placed at a distance of 15 cm from a spherical mirror and a real image is formed at a distance of 30 cm in front of the mirror. Find the focal length of the mirror. Also, identify the mirror.