document.write( "Question 584941: Two small planes start from a common point A at the same time. One flies east at the rate of 300 km/hr the other south at 400 km/hr. After 2 hrs, how fast is the distance between them changing ? \n" ); document.write( "
Algebra.Com's Answer #372991 by Alan3354(69443)\"\" \"About 
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Two small planes start from a common point A at the same time. One flies east at the rate of 300 km/hr the other south at 400 km/hr. After 2 hrs, how fast is the distance between them changing ?
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\n" ); document.write( "Their relative speed is constant,
\n" ); document.write( "= \"sqrt%28300%5E2+%2B+400%5E2%29+=+500\" km/hr
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