Question

A sonar echo takes 4.4s to return from a submarine. If the speed of sound in water is 1500 ms.1,then the distance of submarine from the sonar is:

Answer 1

Since v = 2d/t

= d = v*t / 2

= d = 1500 * 4.4 /2

= 3300m

= 3.3km.

Hope it's helpful to u.

Answer 2

Answer:

The distance of the submarine from the sonar is 3300 meters.

Explanation:

We will use the following formula to solve this question,

$d=\frac{vt}{2}$         (1)

Where,

d=the distance of the submarine from the sonar

v=speed of sound

t=total time taken by the echo

From the question we have,

The time that is taken by the echo to return(t)=4.4 seconds

The speed of sound in water(v)=1500m/s

By placing the value of "v" and "t" in equation (1) we get;

$d=\frac{1500\times 4.4}{2}$

$d=3300\ meters$

Hence, the distance of the submarine from the sonar is 3300 meters.

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