An Air Force pilot making a preliminary aerial survey, first observed that when he flew directly over a straight road connecting two coastal towns X and Y, the angles made by these towns with the vertical were 30° and 60°, respectively. When he flew back directly over the same road for the second observation, his altimeter indicted that he was 1100 meters higher and noted that both towns made an angle of 45° with the vertical.   a. What is the distance between the towns, in kilometers. b. How high is the airplane when the first observation was made?

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