document.write( "Question 503705: Sandra left New York and drove at a speed of 20 kph. Cecille left 3 hours later, from the same point, and drove at a speed of 30 kph. How long it will take Cecille to catch up Sandra?
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Algebra.Com's Answer #339375 by josmiceli(19441) $\"\"$ $\"About$

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What is Sandra's head start in km?
\n" ); document.write( " $\"+d%5B1%5D+=+20%2A3+\"$
\n" ); document.write( " $\"+d%5B1%5D+=+60+\"$ km
\n" ); document.write( "Start a stop watch when Cecille leaves
\n" ); document.write( "Cecille's equation:
\n" ); document.write( " $\"+d+=+30t+\"$
\n" ); document.write( "Sandra's equation:
\n" ); document.write( " $\"+d+-+60+=+20t+\"$
\n" ); document.write( " $\"+d+=+20t+%2B+60+\"$
\n" ); document.write( "Since $\"d\"$ is the same for each,
\n" ); document.write( " $\"+30t+=+20t+%2B+60+\"$
\n" ); document.write( " $\"+10t+=+60+\"$
\n" ); document.write( " $\"+t+=+6+\"$
\n" ); document.write( "It will take 6 hours for Cecille to catch up Sandra \n" ); document.write( "

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