Question

in the determination of focal length of convex lens is ,the image of grill is formed on a screen . the index mark of screen holder is 37.5cm and that of lens holder is 16.2 cm .the distance of grill from the lens is 2.5 m . the focal length of lens is​

Answer 1

Answer:

21.3

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Answer 2

Answer:

Answer is 21.3. Please mark me as brainliast. Hope it helps .