A convex lens forms a real and inverted image of an object placed 20 cm from it. If the image is formed 40 cm away from the lens, what is the focal length? - Study24x7
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A convex lens forms a real and inverted image of an object placed 20 cm from it. If the image is formed 40 cm away from the lens, what is the focal length?

A

10 cm

B

20 cm

C

13.3 cm

D

8 cm

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