A set of 31 tuning forks is arranged in series of decreasing frequencies. Each fork gives 6 beats per second with the proceeding one and frequency of the first fork is twice the frequency of the last. Find the frequency of the first and the last tuning fork.

A set of 28 tuning forks is arranged in a series of decreasing frequencies.Each fork girves 4 beats per second with the preceding one and the frequencies of the first forks is an octave of the last.The frequency of the first fork in Hz is

A set of 48 tuning forks is arranged in a series of descending frequencies such that each fork gives 4 beats per second with preceding one.The frequency of first fork is 1.5 times the frequency of the last fork, find the frequency of the first and 42^nd tuning fork.

A set of 8 tuning forks is arranged in a series of increasing order of frequencies. Each fork gives 4 beats per second with the preceeding one and the last fork is an octave of the first .Find the frequency of the first fork.

A set of 8 tuning forks is arranged in a series of increasing order of frequencies .Each fork gives 4 beats per second with the next one and the frequency of last fork is twice that of the first. Calculate the frequencies of the first and the last fork.

A set of 56 tuning forks is arranged in series of increasing frequencies.If each fork gives 4 beats with preceding one and the frequency of the last in twice that of first ,then frequency of the first fork is

A set of 11 tuning forks is kept in ascending order of frequencies. Each tuning fork gives 5 beats per second with the previous one. If the frequency of the last fork is 1.5 times that of the first , find the frequency of the first and last fork.

Eleven tuning forks are arranged in the ascending order of frequencies .Each tuning fork gives 4 beats per second with the preceding fork. If the frequency of the last fork is twice that of the first , find the frequency of the first , last and fifth fork.

A set of 12 tuning forks is arranged in order of increasing frequencies. Each fork produces y beats persecond with previousone.The last is anoctave of the first. The fifth fork as frequency 90 Hz.Find y and the frequency of the first and lastfork

A set of 56 tuning forks are so arranged in series that each fork gives 4 beats per second with the previous one. The frequency of the last fork Is 3 times that of the first. The frequency of the first fork is