A tall person 'A' and a short person 'B' stood before a plane mirror. 'A' stands 1.25 metres behind 'B' . If the distance between 'B' and the plane mirror is 50 cm , then the distance between 'A' and his image in the mirror is _______ .

Options

A. 4 cm
B. `3.5` cm
C. `4.5` cm
D. `3.75` cm

Answer

B

Explanation

Distance between the plane mirror and B = 50 cm
`= 0.5 m `
Distance between A and B = `1.25 m `
Therefore , distance between the plane mirror and
`A = 1.25 m + 0.5 m `
Therefore , distance between A and his image in the mirror = `2xx 1.75 m `
`= 3.5 m `