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At noon, ship A is 120 km west of ship B. Ship A is sailing east...

At noon, ship A is 120 km west of ship B. Ship A is sailing east at 20 km/h and ship B is sailing north at 15 km/h. How fast is the distance between the ships changing at 4:00 PM?
km/h
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Answer #1

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Solution:-

Here, D = the distance between ship A and ship B after t hours,

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