A rescue plane flies horizontally at a constant speed searching for a disabled boat. When the plane is directly above the boat, the boat's crew blows a loud horn. By the time the plane's sound detector perceives the horn's sound, the plane has traveled a distance equal to one-third its altitude above the ocean. (a) If it takes the sound 2.18 s to reach the plane, determine the speed of the plane. Take the speed of sound to be 343 m/s. m/s (b) What is its altitude?

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