document.write( "Question 1031477: a train at an average speed of 100km/h covers a certain distance in 3 hours 36min.At what average speed must the train travel to cover the same distance in 2hours 30min
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #646181 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"R%2At=D\"$
\n" ); document.write( "Convert to common units of time,
\n" ); document.write( " $\"T%5B1%5D=3%2A60%2B36=180%2B36=216\"$
\n" ); document.write( " $\"T%5B2%5D=2%2A60%2B30=120%2B30=150\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"R%5B1%5DT%5B1%5D=R%5B2%5DT%5B2%5D\"$
\n" ); document.write( " $\"100%2A216=R%5B2%5D%2A150\"$
\n" ); document.write( " $\"R%5B2%5D=144\"$
\n" ); document.write( "144 km/h \n" ); document.write( "

\n" );