document.write( "Question 971111: On a sale's trip, Samir drives the 600 miles to Richmond averaging a certain speed, The return trip is made at an average speed 22 mph slower. Total time for the round trip is 22 hrs. Fin Samir's average speed on each part of the trip. \n" ); document.write( "

Algebra.Com's Answer #593772 by anand429(138) $\"\"$ $\"About$

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Let avg. speed while going = s
\n" ); document.write( "then, avg. speed while returning = s-22 mph
\n" ); document.write( "total time taken for trips = 22 hrs
\n" ); document.write( "So,
\n" ); document.write( " $\"600%2Fs+%2B+600%2F%28s-22%29+=+22\"$
\n" ); document.write( " $\"600s+-+600%2A22+%2B+600s+=+22%2As%2A%28s-22%29\"$
\n" ); document.write( " $\"1200s+-+13200+=+22s%5E2+-+484s\"$
\n" ); document.write( " $\"22s%5E2+-+1684s+%2B+13200+=+0\"$
\n" ); document.write( " $\"s=67.7\"$ s= 8.9 not valid since return speed will become negative.
\n" ); document.write( "So, speeds while going n returning are 67.7mph and 45.7mph respectively. \n" ); document.write( "

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