document.write( "Question 865131: A motorboat went 10 miles upstream for 60 minutes. The return trip took only 30 minutes. Assume that the speeds of the boat and current were constant during this round trip. Find each speed of the boat and current as mile per hour. \n" ); document.write( "
Algebra.Com's Answer #521552 by Alan3354(69443)\"\" \"About 
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Find the speed up and downstream
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\n" ); document.write( "up = 10 mi/hr
\n" ); document.write( "down = 20 mi/hr
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\n" ); document.write( "The boat speed is the average = 15 mi/hr
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\n" ); document.write( "The current is the difference between boat speed and groundspeed = 5 mi/hr
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