document.write( "Question 892728: Jack droved at 80 km/s for the first 5/9 of his journey. he then completed the remaining 24 km of his journey in 12 minutes.
\n" ); document.write( "how long did he take to complete the whole journey?
\n" ); document.write( "what was his speedfor the second part of his journey? \n" ); document.write( "
Algebra.Com's Answer #540992 by lwsshak3(11628)\"\" \"About 
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Jack droved at 80 km/s for the first 5/9 of his journey. he then completed the remaining 24 km of his journey in 12 minutes.
\n" ); document.write( "how long did he take to complete the whole journey?
\n" ); document.write( "what was his speed for the second part of his journey?
\n" ); document.write( "I will assume you meant 80 km/hr instead of 80 km/sec for the first part of the journey
\n" ); document.write( "***
\n" ); document.write( "let x=total distance of the journey
\n" ); document.write( "4/9=24/x
\n" ); document.write( "4x=9*24
\n" ); document.write( "x=54 km
\n" ); document.write( "(5/9)x=30 km
\n" ); document.write( "..
\n" ); document.write( "for the first 5/9 of his journey
\n" ); document.write( "travel time=distance/speed
\n" ); document.write( "30 km/80 km/hr=3/8 hr=22.5 min
\n" ); document.write( "..
\n" ); document.write( "for the second part of his journey
\n" ); document.write( "speed=distance/travel time
\n" ); document.write( "24 km/(12/60) hr=120 km/hr
\n" ); document.write( "how long did he take to complete the whole journey=22.5+12=34.5 min
\n" ); document.write( "what was his speed for the second part of his journey=120 km/hr \n" ); document.write( "
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