document.write( "Question 843865: While driving on the highway, Dave averages 60 miles per hour. In the city, he averages 30 miles per hour. On a trip to his grandmother's house, Dave drove 235 hours on the highway and 115 hours in the city. What was Dave's average speed for the entire trip, in miles per hour? Round to the nearest tenth. \n" ); document.write( "

Algebra.Com's Answer #508387 by lwsshak3(11628) $\"\"$ $\"About$

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While driving on the highway, Dave averages 60 miles per hour. In the city, he averages 30 miles per hour. On a trip to his grandmother's house, Dave drove 235 hours on the highway and 115 hours in the city. What was Dave's average speed for the entire trip, in miles per hour? Round to the nearest tenth.
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\n" ); document.write( "distance traveled on the highway=235*60=14100 miles
\n" ); document.write( "distance traveled 1n the city=115*30=3450 miles
\n" ); document.write( "total distance traveled=14100+3450=17550 miles
\n" ); document.write( "total travel time=235+115=350 hrs
\n" ); document.write( "Dave's average speed=distance/travel time=17550/350=50.1 miles per hour
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