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Question

A man is standing exactly at midway between a wall and a mirror and he want to sce the full height ofthe wall (behind him) in a plane mirror (in front of him). If the height of wall is H , then the minimumm length of mirror should be

A
H4
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B
2H3
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C
H3
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D
H5
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Solution

The correct option is C H3
From the figure we can see that ΔEFG and ΔCDG are similar.
FECD=GIGK
FEH=d/2d/2+d=1/23/2=13
FE=H3
Hence the correct answer is option (C).


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