Question

19. A man of height 170 cm stands in the middle of a room of length 10m. The height of a wall is 3m.
What is the minimum length of a mirror to be placed on the wall in front of the man. So that he can see
the entire wall behind him.
]
a) 30 m
b) 40 m
c) 20 m
d) 5 m​

Answer 1

Explanation:

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