A ship travelling towards a cliff receives the ... - JAMB Physics 2020 Question
A ship travelling towards a cliff receives the echo of its whistle receives the echo of its whistle after 3.5 seconds. If the speed of sound in air under the prevailing conditions is 250ms\(^{-1}\), how much closer is the ship to the cliff?
A
10m
B
A. 350m
C
175m
D
125m
correct option: d
Difference in time = 1 sec
Echo time = 1 \(\div\) 2 = 0.5 sec
Difference of cliff from ship = 0.5 x 250
= 125m
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