A submarine (A) travelling at 18 km/hr is being chased along the line of its velocity by another submarine (B) travelling at 27 km/hr. B sends a sonar signal of 500 Hz to detect A and receives a reflected sound of frequency ν. The value of ν is close to:(Speed of sound in water = 1500 m/s)

A submarine (A) travelling at 18 km/hr is being chased along the line

1.	A submarine (A) travelling at 18 km/hr is being chased along the line of its velocity by another submarine (B) travelling at 27 km/hr. B sends a sonar signal of 500 Hz to detect A and receives a reflected sound of frequency ν. The value of ν is close to:(Speed of sound in water = 1500 m/s)
A.	504 Hz
B.	507 Hz
C.	499 Hz
D.	502 Hz
Answer» E.