A submarine 
travelling at 
is being chased along the line of its velocity by another submarine 
travelling at 
. 
sends a sonar signal of 
to detect 
and receives a reflected sound of frequency 
. The value of 
is close to
(Speed of sound in water 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
JEE Main 2019
No reflected signal,
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