document.write( "Question 478793: pls. help me solve this prob. tnx.\r
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document.write( "prob.1. A car and a lorry set off on a 390-km journey at the same time. The lorry traveled at a speed of 60km/hr. The car reached the destination 1 and 1/2 hour earlier than the lorry. find the speed of the car.\r
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Algebra.Com's Answer #328050 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! A car and a lorry set off on a 390-km journey at the same time. The lorry traveled at a speed of 60km/hr. The car reached the destination 1 and 1/2 hour earlier than the lorry. find the speed of the car. \r \n" ); document.write( "\n" ); document.write( "----- \n" ); document.write( "Lorry DATA: \n" ); document.write( "rate = 60 km/hr ; distance = 390 km ; time = d/r = 390/60 = 13/2 hrs \n" ); document.write( "---- \n" ); document.write( "Car DATA: \n" ); document.write( "distance = 390 km ; time = (13/2)-(3/2) = 5 hrs \r \n" ); document.write( "\n" ); document.write( "--- \n" ); document.write( "Car rate = distance/time = 390/5 = 78 km/hr \n" ); document.write( "================================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "=========== \n" ); document.write( " |