Question
From the top of a straight pillar 20 meters high, the
angle of elevation of the top of a straight tower was 45°. If the tower was 70 meters high, then at what distance was the base of the tower from the base of the pillar?Solution
AC =70, and DE =20 AB =70-20 =50m. Tan 45° =AD/BD =AB/CE 1 =50 /CE CE =50m. 
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