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The disc of a siren revolves 600 times i...

The disc of a siren revolves 600 times in one minute and it is in unison with a tuning fork of frequency 480 Hz. The number of holes in the disc is

A

24

B

38

C

48

D

56

Text Solution

Verified by Experts

The correct Answer is:
C
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NCERT FINGERTIPS-PRACTICE PAPERS-Practice Paper 3
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