Multiple Choice Question XXXVIII — task. Science CBSE, Class 10.

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Least distance of distinct vision of a long-sighted man is \(40\ cm\). He wish to reduce it to \(25\ cm\) by using a lens, the focal length of the lens is -

\(+200\ cm\)
\(-200\ cm\)
\(+\frac{200}{3}\ cm\)
\(-\frac{200}{3}\ cm\)

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