document.write( "Question 496648: Jaidee left the airport driving toward the desert three hours before Wilbur. Wilbur drove in the opposite direction going 18 km/h faster than Jaidee for one hour after which time they were 193 km apart. Find Jaidee's speed. \n" ); document.write( "

Algebra.Com's Answer #336509 by josmiceli(19441) $\"\"$ $\"About$

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You can think of this as one of them traveling
\n" ); document.write( "at the sum of their speeds and the other one
\n" ); document.write( "standing still.
\n" ); document.write( "I'll say Wilbur is standing still and Jaidee is
\n" ); document.write( "moving at the sum of their speeds.
\n" ); document.write( "If $\"s\"$ is Jaidee's speed alone, their sum is
\n" ); document.write( " $\"+s+%2B+s+%2B+18+=+2s+%2B+18\"$
\n" ); document.write( "Jaidee drove for 3 hrs when Wilbur wasn't driving,
\n" ); document.write( "so Jaidee's head start was $\"+d%5B1%5D+=+s%2A3+\"$
\n" ); document.write( " $\"+193+\"$ km is their distance apart after $\"+3+%2B+1+=+4+\"$ hrs
\n" ); document.write( " $\"+193+=+3s+%2B+%282s+%2B+18%29%2A1+\"$
\n" ); document.write( " $\"+193+=+3s+%2B+2s+%2B+18+\"$
\n" ); document.write( " $\"+5s+=+193+-+18+\"$
\n" ); document.write( " $\"+5s+=+175+\"$
\n" ); document.write( " $\"+s+=+35+\"$
\n" ); document.write( " $\"+s+%2B+18+=+53+\"$
\n" ); document.write( "Jaidee's speed is 35 km/hr
\n" ); document.write( "check:
\n" ); document.write( "The sum of their speeds is $\"+53+%2B+35+=+88+\"$ km/hr
\n" ); document.write( " $\"+193+=+3%2A35+%2B+88+\"$
\n" ); document.write( " $\"+193+=+105+%2B+88+\"$
\n" ); document.write( " $\"+193+=+193+\"$
\n" ); document.write( "OK \n" ); document.write( "

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