1.

A 2 cm high object is placed on theprincipal axis of a concave mirror at adistance of 12 cm from the pole. If theimage is inverted, real and 5 cm high,then the focal length of the mirror is(A) 30 cm(B) 25 cm(C) 8.6 cm(D) 20 cm

Answer»

answer of this question is b

B is the right answer



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