document.write( "Question 957366: A journey of 540Km is completed in 7 hr. 30 minutes. If 2/3 of the journey is completed at 80 Km/hr. At what speed is the remaining journey completed. \n" ); document.write( "
Algebra.Com's Answer #585108 by ankor@dixie-net.com(22740)\"\" \"About 
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A journey of 540Km is completed in 7 hr. 30 minutes.
\n" ); document.write( " If 2/3 of the journey is completed at 80 Km/hr.
\n" ); document.write( " At what speed is the remaining journey completed.
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\n" ); document.write( "Let s = the av speed the last third of the journey
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\n" ); document.write( "\"2%2F3\"* 540 = 360 km at 80 km/h
\n" ); document.write( "then
\n" ); document.write( "\"1%2F3\" * 540 = 180 km at s km/hr
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\n" ); document.write( "Write a time equation, time = dist/speed
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\n" ); document.write( "80km/h time + s km/h time = total time (7.5 hrs)
\n" ); document.write( "\"360%2F80\" + \"180%2Fs\" = 7.5
\n" ); document.write( "4.5 + \"180%2Fs\" = 7.5
\n" ); document.write( "\"180%2Fs\" = 7.5 - 4.5
\n" ); document.write( "\"180%2Fs\" = 3
\n" ); document.write( "180 = 3s
\n" ); document.write( "s = 180/3
\n" ); document.write( "s = 60 km/hr for the remainder of the journey
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