document.write( "Question 927508: A child is running on a moving sidewalk in an airport. When she runs against the sidewalk's motion, she travels 40 ft in 8 seconds. When she runs with the sidewalk's motion, she travels 132 ft in 12 seconds. What is the rate of the child on a still sidewalk and what is the rate of the moving sidewalk? \n" ); document.write( "
Algebra.Com's Answer #563007 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Find the 2 speeds. \n" ); document.write( "The child's rate is the average of them. \n" ); document.write( "The sidewalk's rate is the difference between 1 of the 2 speeds and her speed. \n" ); document.write( " |