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JEE Mains Model Paper 22

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Question : 19 of 90
 
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A convex lens at focal length 15 cm placed coaxially in front of a convex mirror. The lens is 5 cm from apex of mirror. When an object is placed on the axis at a distance 20 cm from the lens, it is found that image coincides with object, radius of curvature of mirror is
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