Question #327ab

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Question #327ab

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Answer 1 · 2016-07-18T20:32:22

I found: #90cm# and probably his sister will not be able to see her shoes...I think!

Explanation:

I considered the law of reflection (angle of incidence equal to angle of reflection) and some geometry to get:
enter image source here
The distances are:
#a# from top of the head to eyes;
#b# from eyes to shoes.

....I didn't use the distance from the mirror....!

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Question #327ab

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