An object is placed at a distance of 40 ...

An object is placed at a distance of `40 cm` from a concave mirrorr of focal length `15 cm`. If the object is displaced through a distance of `20 cm` towards the mirrorr, the displacement of the image will be

30 cm away from the mirror

36 cm away from the mirror

30 cm towards the mirror

36 cm towards the mirror

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