document.write( "Question 1055868: A boat's crew rowed 35 kilometers downstream, with the current, 5 hours. The return trip upstream, against the current, covered the same distance, but took 7 hours. Find the crew's rowing rate in still water and the rate of the current.\r
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\n" ); document.write( "A boat's crew rowed 35 kilometers downstream, with the current, 5 hours. The return trip upstream, against the current, covered the same distance, but took 7 hours. Find the crew's rowing rate in still water and the rate of the current.\r
\n" ); document.write( "\n" ); document.write( "The crew's rowing rate in still water is_______ Kilometer(s) per hour.
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Let speed in still water, and of current be S, and C, respectively
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document.write( "Then average speed with the current = , or 7 km/h
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document.write( "Average speed against the current = , or 5 km/h
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document.write( "We then get the following system of AVERAGE-SPEED equations: 
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document.write( "Add the 2 equations to get: 2S = 12
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document.write( "S, or speed in still water =  \n" );
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