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Two points P and Q are at the distance o...

Two points P and Q are at the distance of x and y (where `ygtx)` respectivelyf from the base of a building and on a straight line.If the angles of elevation of the top of the building from points P and Q are complementary ,then what is the height of the building ?

A

xy

B

`sqrt((y//x))`

C

`sqrt((x//y))`

D

`sqrt((xy))`

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