document.write( "Question 763584: two aircraft start from the same point at the same time flying in opposite directions. The faster aircraft travels twice as fast as the other one. After 5 hours of travel they are 1500 miles apart. find the average speed of each aircraft \n" ); document.write( "

Algebra.Com's Answer #464875 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
You can think of this as one aircraft standing still
\n" ); document.write( "and the other moving away from it at the sum
\n" ); document.write( "of their speeds
\n" ); document.write( "Let $\"+s+\"$ = the speed of the slower one
\n" ); document.write( " $\"+2s+\"$ = the speed of the faster one
\n" ); document.write( "----------------------------------
\n" ); document.write( " $\"+1500+=+%28+s+%2B+2s+%29%2A5+\"$
\n" ); document.write( " $\"+1500+=+15s+\"$
\n" ); document.write( " $\"+s+=+100+\"$
\n" ); document.write( " $\"+2s+=+200+\"$
\n" ); document.write( "Their speeds are 100 mi/hr and 200 mi/hr
\n" ); document.write( "check:
\n" ); document.write( " $\"+d%5B1%5D+=+s%2A5+\"$
\n" ); document.write( " $\"+d%5B1%5D+=+100%2A5+\"$
\n" ); document.write( " $\"+d%5B1%5D+=+500+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+d%5B2%5D+=+2s%2A5+\"$
\n" ); document.write( " $\"+d%5B2%5D+=+1000+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+d%5B1%5D+%2B+d%5B2%5D+=+1500+\"$
\n" ); document.write( "OK \n" ); document.write( "

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