An object is kept at a distance of 16 cm...

An object is kept at a distance of `16 cm` from a thin lens and the image formed is real. If the object is kept at a distance of `6 cm` from the lens, the image formed is virtual. If the sizes of the images formed are equal, the focal length of the lens will be

8 cm

5 cm

11 cm

`sqrt(96) cm`

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