document.write( "Question 1193962: Starting from the same point, Reden starts walking eastward at 60 cm/s while Neil starts running towards the south at 80 cm/s. How fast is the distance between Reden and Neil increasing after 2 seconds? \n" ); document.write( "

Algebra.Com's Answer #826029 by ikleyn(52824) $\"\"$ $\"About$

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\n" ); document.write( "Starting from the same point, Reden starts walking eastward at 60 cm/s
\n" ); document.write( "while Neil starts running towards the south at 80 cm/s.
\n" ); document.write( "How fast is the distance between Reden and Neil increasing after 2 seconds?
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document.write( "The distance between them is (Pythagoras)  \r\n" );
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document.write( "    d =  =  = 100t.\r\n" );
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document.write( "The problem asks to calculate the derivative d'(t) at t= 2 seconds.\r\n" );
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document.write( "The derivative is d'(t) = 100.  It is constant and does not depends on time.\r\n" );
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document.write( "So, the answer is: the distance between Reden and Neil uncreases at the constant rate of 100 cm per second.\r\n" );
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