document.write( "Question 1101054: Peter drove from Ottawa to London, a distance of 575km in 8 hours. Part of the trip was spent driving on a four-lane highway where he averaged 100km/h. The remainder of the trip was spent on a two-lane highway where he averaged 50km/h. How much time was spent driving on the four-lane highway. (use algebra) \n" ); document.write( "

Algebra.Com's Answer #715628 by jorel1380(3719) $\"\"$ $\"About$

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Let n be the part he drove at 100 kmh, and 575-n be the part driven at 50 kph. Then:
\n" ); document.write( "n/100 + 575-n/50=8
\n" ); document.write( "n+2(575-n)=800
\n" ); document.write( "n=350
\n" ); document.write( "Peter drove 350 km at 100 kph
\n" ); document.write( "☺☺☺☺ \n" ); document.write( "

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