A metre ruler is held vertically in front of a plane mirror of 15 cm.Arun peeps through a hole at the 40 cm mark. The range of the scale of the metre ruler that can be seen is
A.10 cm to 40 cm
B .15 cm to 45 cm
C.20 cm to 50 cm
D. None of these
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Answer:
option B
not sure about the answer.
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