A submarine is at a depth of 200 m below the sea level. It descends at a uniform rate of 3 m/s
for 20 seconds. Find its depth from the surface after 20 seconds.
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Step-by-step explanation:
d=s×t
s=3m/s
t=20s
3×20=60m
Already the submarine is below 200m
Hence, 200+60=260m
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