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Question 102
H

A pulse is sent vertically down through water. An echo from a fish arrives after 0.040 s and an echo from the seabed arrives after 0.160 s. Sound travels at 1500 m/s. How far above the seabed is the fish?

[1]
A

180 m180\ \mathrm{m}180 m

B

30 m30\ \mathrm{m}30 m

C

120 m120\ \mathrm{m}120 m

D

90 m90\ \mathrm{m}90 m

Markscheme

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