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Assuming that a person with normal sight can read texts from such a distance that the letters subtend an angle of 12′ at his eye. What should be the height (in cm) of the letters that he can read from a distance of 7 m2.44

Answer» Assuming that a person with normal sight can read texts from such a distance that the letters subtend an angle of 12 at his eye. What should be the height (in cm) of the letters that he can read from a distance of 7 m
  1. 2.44


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