Q 1639691512.     two observers are stationed due North of a tower (of
height `x m`) at a distance .`y m` from each other. The
angles of elevation of the tower observed by them are
`30^0` and `45^0`, respectively. Then, `x//y` is equal to

CDS 2016
A

`(sqrt2-1)/2`

B

`(sqrt3-1)/2`

C

`(sqrt3+1)/2`

D

`1`

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