document.write( "Question 236238: Please help me figure this out. I have tried but I'm still not sure how to do it.\r
\n" ); document.write( "\n" ); document.write( "At 10:00 a.m. two planes leave an airport. If the northbound plane flies at 280 mph and the southbound at 320 mph, at what time will they be 1,000 miles apart?\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #173932 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
280t+320t=1,000
\n" ); document.write( "600t=1,000
\n" ); document.write( "t=1,000/600
\n" ); document.write( "t=1.667 hours or 1 hr. & 40 min. they will be 1,000 miles apart.
\n" ); document.write( "10:00+1:40=11:40 is the time.
\n" ); document.write( "
\n" );