document.write( "Question 1188755: two cars begin a trip from the same point if car A travel north at the rate of 30 min/h and car B travel west at the rate 40min/h how fast rate distance between them changing 2hrs later
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Algebra.Com's Answer #819982 by ikleyn(52834) $\"\"$ $\"About$

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\n" ); document.write( "two cars begin a trip from the same point
\n" ); document.write( "if car A travel north at the rate of 30 $\"highlight%28miles%2Fh%29\"$ and car B travel west at the rate 40 $\"highlight%28miles%2Fh%29\"$
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\n" ); document.write( "\n" ); document.write( "            From your post, I see that you are not able to write the dimension of speed correctly. \r
\n" ); document.write( "\n" ); document.write( "            It tells me, how far your knowledge goes on the subject ( ! ).\r
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\n" ); document.write( "\n" ); document.write( "            THEREFORE, I changed it myself from min/h to miles/h.\r
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document.write( "One leg of the right angled triangle is 30*t miles long (where \"t\" denotes the time).\r\n" );
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document.write( "Other leg is 40*t miles.\r\n" );
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document.write( "The hypotenuse is   =  = 50*t.\r\n" );
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document.write( "The hypotenuse is the distance between the cars, and it is proportional to the time.\r\n" );
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document.write( "So, the rate of changing the distance is 50 miles per hour, and it does not depend on time.\r\n" );
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document.write( "It is constant and is equal to 50 miles per hour always, until the cars move according to the given rule\r\n" );
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document.write( "(and until we can consider the spherical Earth surface as flat).   ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved, explained, answered and completed.\r
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\n" ); document.write( "\n" ); document.write( "By the way, the question formulation in your post is not a proper English,\r
\n" ); document.write( "\n" ); document.write( "so it is difficult to understand what you really ask about.\r
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\n" ); document.write( "\n" ); document.write( "Therefore, I will not even try to interpret your question (because it is impossible).\r
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\n" ); document.write( "\n" ); document.write( "I only will give my answer in two different forms, that express the same thought:\r
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\n" ); document.write( "\n" ); document.write( "         (1)   the distance between the cars is changing at the constant rate of 50 mph,
\n" ); document.write( "                which does not depend on time.\r
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\n" ); document.write( "\n" ); document.write( "         (2)   the rate of changing the distance between the cars is 50 miles per hour and does not change in time.\r
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