document.write( "Question 884857: a train travel 68 km/h at an average speed of 51 km/h.It than travel another 20 km at an average speed of 40 km/h before reaching its destination. Calculate the average speed for the whole journey. \n" ); document.write( "
Algebra.Com's Answer #534714 by JulietG(1812)![]() ![]() You can put this solution on YOUR website! At 51kmh, the train would need to travel 1 \n" ); document.write( "At 40kmh, the train would need to travel \n" ); document.write( "Total travel time is 1 \n" ); document.write( "In that time, total distance is 88km \n" ); document.write( "88km / 1.8333 (converted the fraction to decimal for ease of use) = 48kmh average speed. \n" ); document.write( " |