document.write( "Question 462101: A driver of the car took a day trip around the California coast line driving at two different speed. He drove 70 miles at a slower speed and 300 miles at a speed 40 miles hour faster. If the time spent during the faster speed was twice that spent at a slower speed, find the two speeds during the trip. \n" ); document.write( "
Algebra.Com's Answer #316858 by mananth(16946) You can put this solution on YOUR website! let slower speed = x ===> distance = 70 \n" ); document.write( "faster speed= x+40 ====> distance = 300 miles\r \n" ); document.write( "\n" ); document.write( "t=d/r\r \n" ); document.write( "\n" ); document.write( "2(70/x) = (300/(x+40)) \n" ); document.write( "..\r \n" ); document.write( "\n" ); document.write( "cross multiply\r \n" ); document.write( "\n" ); document.write( "140(x+40)=300x \n" ); document.write( "140x+5600=300x \n" ); document.write( "160x=5600 \n" ); document.write( "x=35 mph\r \n" ); document.write( "\n" ); document.write( "faster speed = 75 mph \n" ); document.write( " |