Question

plss tell me the answer of the third question ​

Answer 1

Answer:

$\: \:$

Step-by-step explanation:

For the boatman above the surface of water...

speed of sound in air = 344 m/s

distance covered = 100 m

time taken by sound = t sec

velocity = distance / time

 

 344 = 100 / t

  t  = 100 / 344

 t = 0.29 sec

 

Now, for the man below the surface of water

speed of sound in water = 1533 m/s

distance covered = 100 m

time taken = t

But velocity = distance / time

      1533 = 100 / t

         t   = 100 / 1533 

          t  = 0.06 sec

So , the man under the water hear the sound of the explosion first....