The width of man's face is 10 cm. The distance between the eyes of the man is 4 cm. Then the minimum width of plane mirror to see his full face, is

Question

The width of man's face is 10 cm. The distance between the eyes of the man is 4 cm. Then the minimum width of plane mirror to see his full face, is (A) 5 cm (B) 4 cm (C) 3 cm (D) 10 cm

Tardigrade Admin · Accepted Answer

Min. width of plane mirror to see full face =(D-d/2)=(10-4/2)=3 cm

Q. The width of man's face is $10 c m$ . The distance between the eyes of the man is $4 c m$ . Then the minimum width of plane mirror to see his full face, is

$5 c m$

$4 c m$

$3 c m$

$10 c m$

Min. width of plane mirror to see full face
$= \frac{D - d}{2} = \frac{10 - 4}{2} = 3 c m$

Q. The width of man's face is 10cm. The distance between the eyes of the man is 4cm. Then the minimum width of plane mirror to see his full face, is

5cm

4cm

3cm

10cm