document.write( "Question 1163059: A man walking on a railroad bridge is 2/5 of the way along the bridge when he notices a train at a distance approaching at the constant rate of 45 mph . The man can run at a constant rate in either direction to get off the bridge just in time before the train hits him. How fast can the man run? \n" ); document.write( "
Algebra.Com's Answer #787012 by ikleyn(52781)![]() ![]() You can put this solution on YOUR website! .\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "As the problem is worded, printed, submitted and presented in the post, its formulation is partly incomplete and partly incorrect.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I will not go in details why it is so, and will not make corrections in your post.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I will only notice that accurate formulation and the complete solution to the problem is in the lesson\r \n" ); document.write( "\n" ); document.write( " - A man crossing a bridge and a train coming from behind \r \n" ); document.write( "\n" ); document.write( "in this site.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The problem in that lesson has different numbers, but the method of solution is the same.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So, you actually have an accurate formulation to this problem there, and a TEMPLATE to the solution.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Simply substitute your numbers and follow that template.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The answer to the problem's question is THIS:\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " ANSWER. The person should run with the velocity of 9 miles per hour ( in any direction along the bridge (!) ).\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Read the lesson and have fan (!)\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |