document.write( "Question 528000: You drive a car 9 h at 45 km/h, then 9 h at 69 km/h. What is your average velocity? \n" ); document.write( "
Algebra.Com's Answer #349119 by jim_thompson5910(35256)\"\" \"About 
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At first, you've traveled 9*45 = 405 km\r
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\n" ); document.write( "\n" ); document.write( "Afterwards, you've traveled 9*69 = 621 km\r
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\n" ); document.write( "\n" ); document.write( "Add these two distances to get a total distance traveled of 405+621 = 1026 km\r
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\n" ); document.write( "\n" ); document.write( "This is all over a time-span of 9+9 = 18 hrs\r
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\n" ); document.write( "\n" ); document.write( "So the average speed is 1026/18 = 57 km/hr\r
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