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Q: An object is placed at a distance of 10 cm in front of a concave mirror. Its image is formed at a distance at 15 cm on the same side. The focal length of the mirror is :
  • A. 30 cm
  • B. 6 cm
  • C. –6 cm
  • D. –30 cm
Correct Answer: Option C -
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Explanations:

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