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There is a detective submarine installed...

There is a detective submarine installed inside sea water post 26/11 incident to detect terrorists. It is moving with constant speed `V_theta` along a straight line and it sends a wave which travels with speed `V_w` = 1100m/sec in water. Initially waves are getting reflected from a fixed Island and the frequency detected by the submarine is found to be 20% more than the original frequency. When a terrorist ship moving towards the submarine with constant speed `V_s` comes in between the submarine and the island. Frequency of waves reflected from the ship is 80% more than the original frequency.
Bulk modulus of sea water is

A

220 m/sec

B

110 m/s

C

200 m/s

D

None

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The correct Answer is:
A
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