document.write( "Question 1042398: A car complete 10 mile trip in 20 minutes.If car does 1/2 of trip at speed 20 miles/hr, What is the correct speed for remainder of distance? \n" ); document.write( "
Algebra.Com's Answer #657367 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! A car completes a 10 mile trip in 20 minutes. \n" ); document.write( "If car does 1/2 of trip at speed 20 miles/hr, \n" ); document.write( "At 20 mph he completes 5 mi in 15 min; (5/20 = .25 hrs which is 15 min) \n" ); document.write( "therefore \n" ); document.write( "he has to complete 5 mi in the remaining 5 min \n" ); document.write( "What is the correct speed for remainder of distance? \n" ); document.write( "speed = dist/time; 5 min = 1/12 hr \n" ); document.write( "s = \n" ); document.write( "s = 5 * 12 \n" ); document.write( "s = 60 mph to complete 5 mi in 5 min \n" ); document.write( ": \n" ); document.write( "Check this, find the dist at each speed (dist = time * speed) \n" ); document.write( "15 min: 1/4 * 20 = 5 mi \n" ); document.write( "5 min: 1/12 * 60 = 5 mi \n" ); document.write( "----------------- \n" ); document.write( "total dist 10 mi \n" ); document.write( " |