document.write( "Question 855535: David covers a distance of 15 km, partly bye foot at 6 km/h and partly by cycle at 18 km/h. If he takes 1 hour and 10 minutes to finish the journey, find how far he walks? \n" ); document.write( "

Algebra.Com's Answer #515502 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let w = distance walked
\n" ); document.write( "Let c = distance cycled
\n" ); document.write( ":
\n" ); document.write( "David covers a distance of 15 km,
\n" ); document.write( "w + c = 15
\n" ); document.write( ":
\n" ); document.write( "partly bye foot at 6 km/h and partly by cycle at 18 km/h.
\n" ); document.write( "If he takes 1 hour and 10 minutes to finish the journey
\n" ); document.write( "write a time equation; time = dist/speed
\n" ); document.write( " $\"w%2F6\"$ + $\"c%2F18\"$ = 1 $\"1%2F6\"$ hrs
\n" ); document.write( " $\"w%2F6\"$ + $\"c%2F18\"$ = $\"7%2F6\"$ hrs
\n" ); document.write( "multiply by 18 to clear the denominators
\n" ); document.write( "3w + c = 3(7)
\n" ); document.write( "3w + c = 21
\n" ); document.write( " w + c = 15
\n" ); document.write( "------------subtract the 1st equation, eliminate c, find w
\n" ); document.write( "2w = 6
\n" ); document.write( "w = 3 km walked
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "You can confirm this solution, find the distance cycled and find the total time\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );