A beautiful girl with two normal eye wan...

A beautiful girl with two normal eye wants to see full width of her face by a plane mirror. The eye to eye and ear to ear distances of her face are 4 inch and 6 inch respectively. Find the minimum width of the required mirror.

1 inch

2 inch

3 inch

4 inch

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(a) Here the minimum size of mirror
`=(b-a)/2=(6-4)/2=1` inch

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