A person standing 1 m in front of a plane mirror approaches the mirror by 40 cm. The new distance between the person and his image in the plane mirror is

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Q: 9 (CDS-I/2015)
A person standing 1 m in front of a plane mirror approaches the mirror by 40 cm. The new distance between the person and his image in the plane mirror is
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question_subject: 

Maths

question_exam: 

CDS-I

stats: 

0,20,23,16,20,4,3

keywords: 

{'plane mirror': [0, 0, 0, 7], 'new distance': [0, 0, 0, 1], 'mirror': [0, 0, 0, 1], 'person': [3, 1, 18, 13], 'front': [1, 0, 4, 7], 'image': [0, 1, 3, 23], 'cm': [2, 0, 7, 20]}