A lens of focal length forms an upright image three times the size of a real object

PHYSICS · Subjective · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

A lens of focal length 12 cm12\,\text{cm} forms an upright image three times the size of a real object. Find the distance, in centimetres, between the object and image.

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