Question

There are three points - P, B and Q - on the ground in a straight line with a pole AB at B such that the pole AB is leaning away from P and towards Q. If B is 20 m away from
both P and Q and the angles of elevation of the top of the pole as observed from P and Q are 30° and 60° respectively, find the length of the pole.
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Answer 1

Answer:

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