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Discussion

General CBSE Discussion - Classes III-X
(19)

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An object is placed at a distance of 10 cm from a convex lens. The distance between the object and the image is 40 cm. What is the focal length?

 
16 cm
15 cm
8 cm
7.5 cm

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Jhanvi Khurana

The answer should be 12.5 .................................. as per i think