Question

A sonar echo takes 3 sec to return from a whale. How far away is the whale from the sonar? The speed of sound in seawater is 1440 m/s.

Answer 1

Answer:

Distance between sonar and whale is 2160 m.

Explanation:

Let the distance sonar and whale be d.

Given,

speed of sound in seawater, v = 1440 m/s

Time taken, t = 3 s

so,

v = distance covered / time taken

or v = 2d / t

or d = v x t / 2

or d = 1440 x 3 / 2

or d = 2160 m