document.write( "Question 990671: A motorboat heads upstream on a river that has a current of 2.5 miles per hour. The trip upstream takes 4.5 hours and the return trip takes 2 hours. What is the speed of the motorboat? \n" ); document.write( "
Algebra.Com's Answer #610682 by ikleyn(52891)\"\" \"About 
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\n" ); document.write( "Hello,\r
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\n" ); document.write( "\n" ); document.write( "similar problem was solved in the lesson  Wind and Current problems  in this site  (Problem 3).\r
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\n" ); document.write( "\n" ); document.write( "Look in it,  and it will help you to solve your problem.\r
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\n" ); document.write( "\n" ); document.write( "Good luck!\r
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