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A concave lens of focal length 20cm form an image 1/2 the size of the…

A concave lens of focal length 20cm form an image 1/2 the size of the object. The object distance is
  • A.
    100cm
  • B.
    ( frac{100}{q} )
  • C.
    60cm
  • D.
    ( frac{60}{7} )
  • E.
    None of the above
Correct Answer: Option C
Explanation