A lens of focal length 12 cm forms an erect image, three times the size of the object. The distance between the object and image is

Q. A lens of focal length 12 cm forms an erect image, three times the size of the object. The distance between the object and image is:

A.            8 cm

B.            16 cm

C.            24 cm

D.            36 cm

Answer: 8 cm

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