An object is 20 cm to the left of a leens of focal length +10 cm. A second lens, of focal length +12.5 cm, is 30 cm to the right of the first lens. What is the distance between the original object and final image?
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An object is 20 cm to the left of a leens of focal length +10 cm. A second lens, of focal length +12.5 cm, is 30 cm to the right of the first lens. What is the distance between the original object and final image?
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