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Ten tuning forks are arranged in increas...

Ten tuning forks are arranged in increasing order of frequency is such a way that any two nearest tuning forks produce `4 beast//sec`. The highest freqeuncy is twice of the lowest. Possible highest and the lowest frequencies are

A

80 and 40

B

100 and 50

C

44 and 22

D

72 and 36

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The correct Answer is:
D
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