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MMLU-Pro / 9756 / A slide projector designed for 35-mm slides projects a picture on a screen 40 in…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

A slide projector designed for 35-mm slides projects a picture on a screen 40 in by 60 in, 10 ft away. What is the focal length of the lens?

category

physics

options

  1. 1.38 inches
  2. 2.00 inches
  3. 4.5 inches
  4. 2.69 inches
  5. 3.5 inches
  6. 1.75 inches
  7. 5.0 inches
  8. 2.95 inches
  9. 2.75 inches
  10. 3.25 inches

src

stemez-Optics

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Source and history

Official source

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