please solve and give 7 numerical

Dear student,

so from these four set of pictures we can conclude a convex lens forms a real , inverted and magnified image only when object is placed in between F and 2F
so the range 20 cm to 40 cm in this case.
and we can write that the convex lens (of focal length 20 cm) forms a real and magnified image when the object is placed between 20 cm and 40 cm.

image (iv) is corresponding ray diagram

Regards,

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