RRB Technician 2013 Ques 119
Question: A man is 180 cm tall and his eyes are 10 cm below the top of his head. In order to see his entire height, right from toe to head, he uses a plane mirror kept at a distance of 1 m from him. The minimum length of the plane mirror required is
Options:
A) $ $ 180 cm
B) 90 cm
C) 85 cm
D) 170 cm
Show Answer
Answer:
Correct Answer: B
Solution:
- Length of plane mirror $ =\frac{1}{2}\times $ Height of person $ =\frac{1}{2}\times 180=90,cm $
BETA
