document.write( "Question 281723: A BOAT TRAVELING AT A SPEED OF 36 KM PER HOUR. IT HAS TO TRAVEL A DISTANCE OF 210 KM. HOW LONG WILL IT TAKE \n" ); document.write( "
Algebra.Com's Answer #204681 by PRMath(133)\"\" \"About 
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A BOAT TRAVELING AT A SPEED OF 36 KM PER HOUR. IT HAS TO TRAVEL A DISTANCE OF 210 KM. HOW LONG WILL IT TAKE\r
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\n" ); document.write( "\n" ); document.write( "You just need to know ONE equation about rate, time and distance.
\n" ); document.write( "You should always remember this equation:\r
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\n" ); document.write( "\n" ); document.write( "\"Rate+%2A+Time+=+Distance\"\r
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\n" ); document.write( "\n" ); document.write( "Let's put it in terms of variables:
\n" ); document.write( "Let's call Rate: R
\n" ); document.write( "Let's call Time: T
\n" ); document.write( "Let's call Distance: D\r
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\n" ); document.write( "\n" ); document.write( "So now we have:\r
\n" ); document.write( "\n" ); document.write( "\"R+%2A+T+=+D\" or RT = D\r
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\n" ); document.write( "\n" ); document.write( "What if you wanted to solve for R? Can you see that if you had RT = D that you could solve for \"R\" just by dividing T from both sides of the equation:\r
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\n" ); document.write( "\n" ); document.write( "RT = D
\n" ); document.write( "\"R+=+D%2FT\"\r
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\n" ); document.write( "\n" ); document.write( "What if you wanted to solve for T? Can you see that if you had RT = D, that you could solve for \"T\" just be dividing R from both sides of the equation:\r
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\n" ); document.write( "\n" ); document.write( "RT = D
\n" ); document.write( "\"T+=+D%2FR\"\r
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\n" ); document.write( "\n" ); document.write( "So now from just ONE equation: RT = D, you can \"switch it around\" so to speak and solve for Rate or you can solve for T. \r
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\n" ); document.write( "\n" ); document.write( "In this problem, you want to solve for TIME. So, thinking of our one equation of RT = D, we realize we want to solve for T. Therefore, we should use this equation: \"T+=+D%2FR\"\r
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\n" ); document.write( "\n" ); document.write( "What do we know? \r
\n" ); document.write( "\n" ); document.write( "We know the Rate is 36 km per hour. R = 36
\n" ); document.write( "We know the Distance is 210 miles. D = 210\r
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\n" ); document.write( "\n" ); document.write( "Let's plug that info in: \r
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\n" ); document.write( "\n" ); document.write( "\"T+=+D%2FR\"
\n" ); document.write( "\"T+=+210%2F36\"
\n" ); document.write( "\"T+=+5.83\"\r
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\n" ); document.write( "\n" ); document.write( "SO the boat must travel for 5 hours and .83 of an hour. OR....\r
\n" ); document.write( "\n" ); document.write( "5 hours and
\n" ); document.write( ".83 of 60 minutes which is: 49.8 minutes (\".83+%2A+60+=+49.8\")\r
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\n" ); document.write( "\n" ); document.write( "The boat must travel for 5 hours and 49.8 minutes. \r
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\n" ); document.write( "\n" ); document.write( "I hope this helps you. :-)
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