At what distance from a concave mirror an object should be placed to get an image half the size of the object?

At what distance in front of a concave mirror (f = 10m) an object is to be placed so that the size of the image will be halved of the size of the object?

At what distance from a concave mirror of focal length 25 cm should an object be placed so that the size of image is equal to the size of the object.

An object is placed at a distance of 20.0 cm from a concave mirror of focal length 15.0 cm. (a) What distance from the mirror a screen should be placed to get a sharp image? (b) What is the nature of the image?

At what distance from a concave mirror of focal length 25 cm should an object be placed so that the size of image is equal to the size of the object. Draw a ray diagram to show this.

An object 4 cm in height, is placed at 15cm in front of a concave mirror of focal length 10 cm. At what distance from the mirror should a screen be placed to obtain a sharp image of the object? Calculate the height of the image?

An object of size 7 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen by placed to obtain a sharp image ? Find size and nature of the image.

Rajashree wants to get an inverted image of height 5 cm of an object kept at a distance of 30 cm from a concave mirror. The focal length of the mirror is 10 cm. At what distance from the mirror should she place the screen ? What will be the type of the image, and what is the height of the object?