document.write( "Question 647797: Jennifer drives to her friends house 20km away. There is no direct route so she travels 15km through the city at 50km/h and 15km on the highway at 100km/h. The trip takes 27minutes. Find Jennifer's average speed. \n" ); document.write( "
Algebra.Com's Answer #406387 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Jennifer drives to her friends house 20km away. There is no direct route so she travels 15km through the city at 50km/h and 15km on the highway at 100km/h. The trip takes 27minutes. Find Jennifer's average speed. \n" ); document.write( "------------ \n" ); document.write( "Avg speed = 2*50*100/(50+100) \n" ); document.write( "= 200/3 km/hr \n" ); document.write( "-------------- \n" ); document.write( "Or, she went 30 km in 27 minutes \n" ); document.write( "r = d/t = 30/27 km/min \n" ); document.write( "= 200/3 km/hr \n" ); document.write( " \n" ); document.write( " |