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Two persons are 'a' meters apart and the height of one is double that of the other, if from the middle point of the line joining their feet, an observer find the angular elevation of their tops to be complementary then the height of shorter person is :

A

K/2m

B

`(K)/(2sqrt(2))m`

C

K m

D

None of these

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The correct Answer is:
B
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