A POle stands on the bank of a cicular pond.A man walking along the bank finds that the angle of elevation of the top of the pole,from two points A & B is 30(degrees) each, and from the third point C is 45. If the distance between A-B  and  B-C measured along the bank are 40 and 20 respectively,then:

 

What is the radius of the pond(r)

 

height of the pole(h)