A ship travelling towards a cliff receives the echo of its whistle after 3.5 seconds. A short while later, it receives the echo after 2.5 seconds. If the speed of sound in air under the prevalling condition is 250ms -1, how much closer is the ship to the cliff?
a
10m
b
350m
c
175m
d
125m
Explanation
Correct Option
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Abdulesun
4 years ago
Also👇
Given: t1 3.5sec, t2 2.5sec velocity 250m/s–¹ , d?
Note (d) is distance or depth
From t=2d/v
At 3.5sec
3.5=2d/250
d=3.5x250/2
d = 437.5m
At 2.5sec
2.5=2d/350
d=2.5x250/2
d=312.5
Therefore, 437.5–312.5=125m
===> D
