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Q)

Equi convex lens is placed such that optic axis coincides with the x-axis, position of object is $(-40 \;cm, 1 \;cm) $ and position of image $(50 \;cm, -2\;cm) $ where is the lens located

$(a)\;at \;origin \\ (b)\;+20 \;cm \\ (c)\;-20\;cm \\ (d)\;-10\;cm $

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