document.write( "Question 1165518: A boat traveled downstream a distance of 48 miles and then came right back. If the speed of the current was 12 mph and the total trip took 5 hours and 20 mins, find the average speed of beat relative to water. \n" ); document.write( "

Algebra.Com's Answer #790124 by MathTherapy(10555) $\"\"$ $\"About$

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\n" ); document.write( "A boat traveled downstream a distance of 48 miles and then came right back. If the speed of the current was 12 mph and the total trip took 5 hours and 20 mins, find the average speed of beat relative to water.
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Bemow you'll find the correct setup and CORRECT answer. 
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document.write( "Let boat's average speed be S
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document.write( "Then the time gong downstream = , and time spent going upstream = 
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document.write( "We get the following TIME equation: 
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document.write( "                                     ---- Factoring out GCF, 16, in numerator
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document.write( "                                    3(3)(S - 12) + 3(3)(S + 12) = (S + 12)(S - 12) ------ Multiplying by LCD, 3(S + 12)(S - 12)
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document.write( "                                    
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document.write( "                                    0 = (S - 24)(S + 6)
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document.write( "                                    0 = S - 24     or      0 = S + 6
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document.write( "                                    Speed of boat, or     or     - 6 = S (ignore) \n" );
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