Question

11.
A ship sends a high frequency signal and receives an echo after 4 second. What is the depth of the
sea?
(Given that speed of sound in water is 1500 m/s.)
(1) 1 km
(2) 2 km
(3) 3 km
(4) 4 km​

Answer 1

Explanation:

4km s the right answer..........................