At noon ship A is 100 km west of ship B. Ship A travels south at 35km/h and ship B travels North at 25 km/hr. At 4pm how fast does the distance between them change?

I don't quite understand how to do this so a complete explanation would be best.

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- March 18th 2010, 03:48 AMNevershDistance of two moving objects.
At noon ship A is 100 km west of ship B. Ship A travels south at 35km/h and ship B travels North at 25 km/hr. At 4pm how fast does the distance between them change?

I don't quite understand how to do this so a complete explanation would be best. - March 18th 2010, 04:37 AMZanderist
Haha, I have nearly the same problem.

This has to do with implicit differentiation

Use the formula d = v*t

I would say you could also use a^2+b^2=c^2 but they're going in complete opposite directions.

By the way your problem is featured on youtube.

http://www.youtube.com/watch?v=jv4gTxWqeBE - March 18th 2010, 05:41 AMHallsofIvy