An eagle is sitting on the top of a tower, which is 80m high. The angleof elevation of the eagle from a point on the ground is 45°. Th eagle fliesaway from the point of observation horizontally and remains at a constantheight. After 2 seconds, the angle of elevation of the eagle from the pointof observation become 30°. Find the speed of flying the eagle



The measure  of  total  angle is  180 +180= 360 -180  =180
180-45-30=15  =  165=2 x 30  =60  
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