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A man is 180 cm tall and his eyes are 10...

A man is 180 cm tall and his eyes are 10 cm below the top of his head. In order to see this entire height right from top to head, he uses a plane mirror kept at a distance of 1 m from him. The minimmum length of the plane mirror is

A

180cm

B

90cm

C

85 cm

D

170cm

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