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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 his entire height right from tow to head, he uses a plane mirror kept at a distance of 1 m from him. The minimum height of the plane mirror required is

A

180 cm

B

90 cm

C

85 cm

D

170 cm

Text Solution

Verified by Experts

The correct Answer is:
B
(b) According to ray diagram shown In figure

Length of mirror=`(1)/(2)`(10+170)=90 cm
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