Application of differentiation
2011-01-22 10:07 pm
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Two ships are sailing straight away from a point O. The routes of the two ships is at an angle of 120˚ with each other. Ship A moves at 20 km/h and ship B moves at 15 km/h. At what rate are the ships moving apart from each other when OA = 4 km and OB = 3 km?
回答 (2)
2011-01-22 10:38 pm
2011-01-23 6:00 am
Typing mistake in third-last line..
It should be 2*sqrt37 * d/dt(AB) = 370... not 250
It should be 2*sqrt37 * d/dt(AB) = 370... not 250
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110122000051KK00539