A man 160 cm high stands in front of a plane mirror. His eyes are at a height of 150 cm from the floor. Then the minimum length of the plane mirror for him to see full length image is :
85 cm
80 cm
170 cm
340 cm
A
85 cm
B
170 cm
C
340 cm
D
80 cm
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Solution
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For getting full image, length of the mirror should be half that of an object(man).
Length of mirror =160/2=80cm
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