document.write( "Question 1050730: Jack cycled from A to B at an average speed of 20km/h. He then cycled back from B to A at an average speed of 18km/h. If he took a total of 1 hour 35 minutes, find the distance between A and B? \n" ); document.write( "
Algebra.Com's Answer #666365 by jorel555(1290) ![]() You can put this solution on YOUR website! First, 1 hour,35 minutes equals 1-35/60 hours, or 1-7/12 hours, equaling 19/12 hours total. Let n be the amount of time for the trip from A to B. Then: \n" ); document.write( "20n=18(19/12-n) \n" ); document.write( "20n=342/12-18n \n" ); document.write( "38n=57/2 \n" ); document.write( "n=57/76 \n" ); document.write( "20 km/h x (57/76)hrs. =15 kilometers between A and B. ☺☺☺☺ \n" ); document.write( " \n" ); document.write( " |