SOLUTION: At noon, a car B is 10 km north of another car A. Car A travels to the east at 30 km/h and car B travels south at 40 km/h. When will they be the closest to each other?

Question 518246: At noon, a car B is 10 km north of another car A. Car A travels to the east at
30 km/h and car B travels south at 40 km/h. When will they be the closest to each other?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
The position of car B relative to car A's
starting point is km
The position of car A relative to it's
own starting point is
The distance between A and B is

The minimum value occurs at

They will be closest to each other in 9.6 minutes
Hope I got it

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