document.write( "Question 885443: 3. We had to go 30km through the city and then 30km through the country. Through the city we average 40km/h and through the country we averaged 60km/h. Our average speed for the entire journey was
\n" ); document.write( "a. 44 b. 48 c. 50 d. 45
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Algebra.Com's Answer #535192 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Average speed is always ( total distance ) / ( total time )
\n" ); document.write( "\"+30+=+40t%5B1%5D+\"
\n" ); document.write( "\"+t%5B1%5D+=+3%2F4+\"
\n" ); document.write( "------------------
\n" ); document.write( "\"+30+=+60t%5B2%5D+\"
\n" ); document.write( "\"+t%5B2%5D+=+1%2F2+\"
\n" ); document.write( "----------------
\n" ); document.write( "Average speed = \"+%28+30+%2B+30+%29+%2F+%28+3%2F4+%2B+1%2F2+%29+\"
\n" ); document.write( "Average speed = \"+60+%2F+%28+5%2F4+%29+\"
\n" ); document.write( "Average speed = \"+%284%2F5%29%2A60+\"
\n" ); document.write( "Average speed = 48 km/hr
\n" ); document.write( "The answer is b.\r
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