Question

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​

Answer 1

Explanation:

sound is travelling in liquid

speed=440m/s

distance=6,600m

time=distance/speed

6,600/440

=15sec

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Answer 2

Given: speed of sound in air = 300m/s

           speed of sound in liquid, s = 440 m/s

           distance covered, d = 6.6km

To Find: total time taken by sound, t.

Solution:

To calculate, the formula used:

• distance = speed x time
•            d = s x t

Applying the above formula:

6.6 = 440 x t

First, convert km into m:

1 km = 1000m

6.6km = 6.6 x 1000

          = 660m

Put the value into the formula for t :

660 = 440 x t

    t  = 660/440

       = 66 / 44

       = 3/2

       = 1.5

   t = 1.5 s

Hence the total time taken by sound is 1.5 seconds.