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 :

Answer

`2`

Explanation

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