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An object is placed in front of a convex...

An object is placed in front of a convex mirror at a distance of 50 cm. A plne mirror is introduced convering the lower half of the convex mirror.if the distance between the object and the plane mirror is 30 cm, it is observed that the images formed by two mirrors coicide (n o parallax). The radius of curvature of the convex mirror is

A

12.5 cm

B

15.0 cm

C

25 cm

D

30.0 cm

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