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A beautiful person with two normal eyes ...

A beautiful person with two normal eyes wants to see full width of her face by a plane mirror. The eye and ear to ear distances of her face are `10 cm` and `14 cm` respectively. The minimum width of required mirror is :

Text Solution

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The correct Answer is:
2
Here, eye to eye distance, `a = 10 cm`
ear to ear distance, `d = 14 cm`
:. Minimum width of required mirror is
`x = (b - a)/(2) = (14 - 10)/(2) = 2 cm`.
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