A. 8
B. 7
C. 6
D. 5
E. 4

Correct Answer:

Option C – 6

Explanation

1/f=1/u+1/v

= 1/5−13/5=30/175

U = 175/30 = 5.8m

v/u=35/5.8

= 6

SEE ALSO  A pulse of a sound is transmitted from a ship and the reflection from the sea bed is recorded after 0.2s. Calculate the depth of the sea. [Take speed of sound in sea water = 1560m/s]

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