From a point P on the ground the ang...

From a point `P` on the ground the angle of elevation of a 10m tall building is `30^@` . A flag is hoisted at the top of the building and the angle of elevation of the top of the flag-staff from `P` is `45^@` . Find the length of the flag-staff and the distance of the building from the point `P` . (Take `sqrt(3)=1. 732)` .

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