1.

A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm. On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature 10 cm be placed in order to have an upright image of the object coincident with it [CBSE PMT 1998; JIPMER 2001, 02]

A.            12 cm                                      
B.            30 cm
C.            50 cm                                      
D.            60 cm
Answer» D.            60 cm


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