document.write( "Question 56890: Two camper vans leave Arrowhead Lake at the same time, one traveling north at a speed of 10 km/h faster than the other, which is traveling south. After 3 hours, the camper vans are 420 km apart. Find their speeds. \n" ); document.write( "
Algebra.Com's Answer #38622 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Two camper vans leave Arrowhead Lake at the same time, one traveling north at a speed of 10 km/h faster than the other, which is traveling south. After 3 hours, the camper vans are 420 km apart. Find their speeds. \n" ); document.write( "--------------- \n" ); document.write( "South van DATA: \n" ); document.write( "rate = x kph; time= 3 hrs.; distance = 3x km \n" ); document.write( "------------ \n" ); document.write( "North van DATA: \n" ); document.write( "rate = x+10 kph; time = 3 hrs; distance = 3(x+10)=3x+30 km \n" ); document.write( "--------------- \n" ); document.write( "EQUATION: \n" ); document.write( "dist. + dist. = 420 km \n" ); document.write( "3x+3x+30=420 \n" ); document.write( "6x=390 \n" ); document.write( "x= 65 kph (speed of south-bound van) \n" ); document.write( "x+10= 75 (speed of north-bound van) \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |