document.write( "Question 499411: It takes a boat 6.5 hours to travel 117miles upstream against the current. If the speed of the current is 5mph, what is the speed of the boat in still water? \n" ); document.write( "
Algebra.Com's Answer #337660 by oberobic(2304)\"\" \"About 
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The speed of the boat going upstream (against the current) =
\n" ); document.write( "s -c : the speed in still water - the speed of the current
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\n" ); document.write( "d = rt is the distance equation
\n" ); document.write( "d = 117 (given)
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\n" ); document.write( "t = 6.5 hr (given)
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\n" ); document.write( "c = 5 mph (given)
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\n" ); document.write( "Substitute the knows (givens):
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\n" ); document.write( "117 = (s-5)*6.5
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\n" ); document.write( "Divide both sides by 6.5
\n" ); document.write( "18 = (s-5)
\n" ); document.write( "18 = s -5
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\n" ); document.write( "Add 5 to both sides
\n" ); document.write( "23 = s
\n" ); document.write( "s = 23
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\n" ); document.write( "The speed of the boat in still water is 23.
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\n" ); document.write( "Done.
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