At what distance from his face a person should place concave mirrors of focal length 0.4 m so that magnification in 5 times for a virtual image

Where should an object be placed in front of a concave mirror of focal length 15 cm to have a magnification of 3 in case of (a) real image (b) virtual image ?

Where should an object be placed in front of a concave mirror of focal length 15 cm to have a magnification of 3 in case of (a) real image (b) virtual image ?

An object is placed at a distance of 30cm from a concave mirror of focal length 20 cm. Find the position, nature and the magnification of the image. Draw a ray diagram.

At what distance from a concave mirror of focal length 2 m should a boy stand so that his image is half his height?

At what distance in front of a concave mirrorof focal length 10 cm, an object be placed so that its virtual image of size five times that of the object is obtained?

At what distance in front of a concave mirror of focal length 10 cm, an object be placed so that its real image of size five times that of the object is obtained?

How far should an object be placed from a concave mirror of focal length 15 cm so as to get an image magnified two times?

An object infront of a concave mirror of focal length f. A virtual image is formed with a magnification of 2. To obtain a real image of same magnification the object has to be moved by a distance