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PQR is a triangular park with PQ=PR=200m . A T.V tower stands at the mid-point of QR. If the angles of elevation of the top of the tower at P , Q and R respectively `45^@` , `30^@` and `30^@` then the height of the tower in m is

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PQR is a triangular park with PQ=PR=200m . A.T.V. tower stands at the mid-point of QR . If the angles of elevation of the top of the tower at P , Q and R are respectively 45^(ulo) , 30^(ulo) and 30^(ulo) then the height of the tower (in m ) is

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