Posted by
**Derrick** on
.

Two vertical poles, 3m and 7m long are on the same straight line with a point P on the ground. The shorter pole is 20m from P and the longer pole. The angle of elevation of the top T of the longer pole from the top R of the shorter one is 30degree, calculate i) /RT/ ii) the horizontal distance from P to the longer pole, iii) the angle of elevation of T from P.