1.

When an engine passes near to a stationary observer then its apparent frequencies occurs in the ratio 5/3.  If the velocity of engine is                                                 [MP PMT 2003]

A.            540 m/s                                  
B.            270 m/s
C.            85 m/s                                    
D.            52.5 m/s
Answer» D.            52.5 m/s


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