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OpenStudy (anonymous):
two planes leave the airport at the same time , one flying at 300km/h and the other at 420 km.h. The angle between their flight paths is 90 degrees. after 3 hours how far apart are they?
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OpenStudy (anonymous):
\[\sqrt{(3*300)^2+(3*420)^2}=180 \sqrt{74}=1548.42 \text{km} \]
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