The frequency of a whistle of an engine is 600 cycles/sec is moving wi – McqOptions

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1.	The frequency of a whistle of an engine is 600 cycles/sec is moving with the speed of 30 m/sec towards an observer. The apparent frequency will be (velocity of sound = 330 m/s) [MP PMT 1989]
A.	600 cps
B.	660 cps
C.	990 cps
D.	330 cps
Answer» C. 990 cps

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