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Q6) A radio mast stands at the top of a 15° incline.

From a point A, on the incline, the angle of elevation to the top of the tower is 35^o from the horizontal.

At a point B, which is 100 metres further up the incline in the same vertical plane, the angle of elevation to the top of the mast is 45° from the horizontal.

Calculate the height of the mast. (16)