document.write( "Question 252985: If the average speed of a car is increased from 50 to 60 kph, the time needed to cover a certain distance is reduced by 30 mins. What is the distance involved? \n" ); document.write( "
Algebra.Com's Answer #185190 by richwmiller(17219)\"\" \"About 
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rt=d
\n" ); document.write( "50x=60*(x-1/2)
\n" ); document.write( "50x=60x-30
\n" ); document.write( "30=10x
\n" ); document.write( "3=x=3 hours
\n" ); document.write( "50*3=150 km
\n" ); document.write( "60*2.5=150 km
\n" ); document.write( "150 km distance
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