25 tunning forks are arranged in series in the order of decreasing frequency. Any two successive forks produce 3 beats/sec. If the frequency of the first turning fork is the octave of the last fork, then the frequency of the 21st fork is

16 tuning forks are arranged in the order of decreasing frequency. Any two successive forks gives 5 beats per second when sounded together. If the first tuning fork gives the octave of the last, then determine the frequency of the last fork.

65 tuning forks are arranged in order of increasing frequency. Any two successive forks produce 4 beats//s , when sounded together. If the last fork gives an octave of the first, the frequency of the first fork is

64 tuning forks are arranged in order of increasing frequency and any two successive forks give foor beats per second when sounded together. If the last fork gives the octave of the first, calculate the frequency of the latter.

50 tunning forks are arranged in increasing order of their frequencies such that each gives 4 beats/sec with its previous tuning fork. If the frequency of the last fork is octave of the first, then the frequency of the first tuning fork is

16 tuning forks are arranged in increasing order of frequency. Any two consecutive tuning forks when sounded together produce 8 beats per second. If the frequency of last tuning fork is twice that of first, the frequency of first tuning fork is :-

16 tuning forks are arranged in increasing order of frequency. Any two consecutive tuning forks when sounded together produce 8 beats per second. If the frequency of last tuning fork is twice that of first, the frequency of first tuning fork is :-

16 tuning forks are arranged in increasing order of frequency. Any two consecutive tuning forks when sounded together produce 8 beats per second. If the frequency of last tuning fork is twice that of first, the frequency of first tuning fork is :-