document.write( "Question 530607: A boy walks at 11a.m. at 20mph and another boy starts at 1pm with 35mph on the same route. At what time , the second boy will catch the first boy? \n" ); document.write( "
Algebra.Com's Answer #350169 by mananth(16949) You can put this solution on YOUR website! the distance traveled by both is same when one catches up with the other. \n" ); document.write( "Let them meet at distance x \n" ); document.write( "Boy speed= 20 mph , starts at 11:00 am \n" ); document.write( "Another boy speed= 35 mph starts at 01:00 pm \n" ); document.write( " \n" ); document.write( "Time difference between the starting of the two= 2.00 hours \n" ); document.write( " \n" ); document.write( "Time taken by Boy = X / 20 \n" ); document.write( "Time taken by Another boy = X / 35 \n" ); document.write( " \n" ); document.write( "X / 20 - X / 35 = 2 \n" ); document.write( " \n" ); document.write( "LCD - 140 \n" ); document.write( "Multiply equation by 140 \n" ); document.write( "140/20 x- 140/35 x= 2 * 140 \n" ); document.write( "7 x - 4 x = 280 \n" ); document.write( "3 x = 280 \n" ); document.write( "/ 3 \n" ); document.write( "x= 93.33 miles \n" ); document.write( "Boy speed= 20 mph \n" ); document.write( "Distance = 93.33 miles \n" ); document.write( "Time taken = 93.33 / 20 \n" ); document.write( "Time taken = 4.67 = \n" ); document.write( "0.67 hours = 40.2 minutes \n" ); document.write( "They will be together at 03:37 pm \n" ); document.write( " \n" ); document.write( " |