An object is place 12 cm in front of a lens and the image is upright and 2.5 times as large. What is the focal length of the lens? (a) -30 cm (b) +30 cm (c) -20 cm
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![An object is place 12 cm in front of a lens and the image is upright and 2.5 times as large.
What is the focal length of the lens?
(а) -30 ст
(b) +30 ст
(c) -20 cm](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fabbe649f-9542-4750-a644-5a898c154717%2F9ebc5efc-010d-45c0-9af6-a5907f2c31a4%2Fbo3q3n_processed.jpeg&w=3840&q=75)
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