A) 4.35 km
B) 3.35 km
C) 435 km
D) 335 km
Correct Answer: A
Solution :
Let the depth of the sea be ?d? Time interval before the echo is heard = 6s Speed of sound = 1450 m/s Distance travelled by sound =2d \[\therefore \] \[2d=speed\times time\] \[\Rightarrow \] \[2d=1450\times 6\] \[\Rightarrow \] \[d=4350\text{ }m\] \[\Rightarrow \] \[d=4.35\text{ }km\] \[\therefore \] The depth of the sea = 4.35 kmYou need to login to perform this action.
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