Final answer:
The specific instrument played at Raja's funeral is not identified, but the flute and oboe are examples of open-pipe resonators commonly used in music.
Step-by-step explanation:
The instrument played at Raja's funeral ceremonies is not mentioned in the question, thus providing a specific answer would be speculative. However, traditional instruments commonly associated with funeral ceremonies in various cultures include the flute and tabla, but this can vary widely depending on specific regional and cultural practices.
Open-pipe resonators are a type of musical instrument where the resonating air column vibrates freely at both ends. Two examples of open-pipe resonators are the flute and the oboe. Both instruments have a cylindrical shape that allows air to vibrate within the tube, producing a range of notes when the player covers and uncovers the holes along the instrument's body.