a child is standing in front of a straight plane mirror and his father is standing behind him as shown in the figure the height of the father is double the height of the child what is the minimum length of the mirror required so that the child can completely see his own image and his father's image in the min given that the height of father is 2H
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half of his father's height.
snsingh75116:
how?
answer is 5H/6 but how?
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