document.write( "Question 184850: A boy walked 10 kilometers. He returned in a car at the rate of 30 kilometers an hour. He was gone for 4 hours. What was his rate while walking? \n" ); document.write( "
Algebra.Com's Answer #138696 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Use the formula for distance in terms of rate and time:\r
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\n" ); document.write( "\n" ); document.write( "If he returned 10 km at 30 km/hr then his time for the return trip must have been:\r
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\n" ); document.write( "\n" ); document.write( "If his total travel time was 4 hours, then his walking time must be 4 hours minus his travel time in the car, so:\r
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\n" ); document.write( "\n" ); document.write( "So his 10 km trip took \r
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\n" ); document.write( "\n" ); document.write( "Using the formula again, this time looking for rate in terms of distance and time:\r
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