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An object is placed at a distance of \( 40 \mathrm{~cm} \) from a concave
P mirror of focal length \( 15 \mathrm{~cm} \). If the object is displaced

W through a distance of \( 20 \mathrm{~cm} \) towards the mirror, the displacement of the image will be
[NEET 2018]
(a) \( 30 \mathrm{~cm} \) away from the mirror
(b) \( 36 \mathrm{~cm} \) away from the mirror
(c) \( 30 \mathrm{~cm} \) towards the mirror
(d) \( 36 \mathrm{~cm} \) towards the mirror
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