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Size of Mirror

A tall man of...

Question

A tall man of height $6$ feet wants to see his full image. Then the minimum required length of the mirror will be

A

12

feet

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B

3

feet

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C

6

feet

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D

Any length

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Solution

The correct option is B $3$ feet
Minimum required length of the mirror is half the height of object
$∴$ answer $= \frac{6 f e e t}{2} = 3 f e e t$

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