Answer :

According to the question;

Object distance = u;


Image distance (v) = 20cm;


Focal length = 10cm


By lens formula;







u = -20cm.


Therefore, object is placed at 20 cm in front of lens.


Now;


Height of object h1= 2cm;


Magnification = =


Putting values of v and u


Magnification =




Height of image is 2 cm.


Negative sign means image is inverted.


Thus, the image is real, inverted and same as size of object.


Diagram below shows the image formation.



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