The speed of sound is 330 m/s in air while it is 440 m/s in liquid . The total time taken by sound to cover a distance of 6.6 km in liquid is -
a) 20 seconds
b) 30 seconds
c) 40 seconds
d) 50 seconds
Please provide solution also
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the answer of this question is 15 sec that is none of the answer
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