document.write( "Question 520806: Two planes leave the airport at the same time. One flies directly east at 540 miles per hour. The other flies west at 720 miles per hour. How long will it take them to be 1890 miles apart? \n" ); document.write( "

Algebra.Com's Answer #346239 by Maths68(1474) $\"\"$ $\"About$

You can put this solution on YOUR website!
Effective Speed = 540+720 = 1260 mph
\n" ); document.write( "Distance = 1890 miles\r
\n" ); document.write( "\n" ); document.write( "Time = Distance / Speed
\n" ); document.write( "Time = 1890/1260
\n" ); document.write( "time = 1.5 hour.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "After 1.5 hours two planes will be 1890 miles apart?\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Check
\n" ); document.write( "======
\n" ); document.write( "Plane A Data
\n" ); document.write( "============
\n" ); document.write( "Speed = 540 mph
\n" ); document.write( "Time = 1.5 hour
\n" ); document.write( "Distance covered = ?
\n" ); document.write( "Distance = Speed * Time
\n" ); document.write( "Distance covered= 540 * 1.5 = 810 miles\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Plane B Data
\n" ); document.write( "============
\n" ); document.write( "Speed = 720 mph
\n" ); document.write( "Time = 1.5 hour
\n" ); document.write( "Distance covered = ?
\n" ); document.write( "Distance = Speed * Time
\n" ); document.write( "Distance covered = 720 * 1.5 = 1080 miles\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Total Distance between two planes after 1.5 hours = 1080+810 = 1890 miles\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );