In order to find the depth of the sea, a ship sends out a sound wave and receives an echo after one second. If the velocity of sound in water is 1500ms^-1, what is the depth of the sea?

0.75km

1.50km

2.20km

3.00km

3.75km

Correct answer is A

Echo time = 1 \(\div\) 2 = 0.5sec

depth = velocity x time

= 1500 x 0.5

= 750m = 0.75km

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In order to find the depth of the sea, a ship sends out a sound wave and receives an echo after one second. If the velocity of sound in water is 1500ms-1, what is the depth of the sea?