One hour after yolanda started walking from x to y, a distance of 45 miles, bob started walking along the same road from y to x. if yolanda's walking rate was 3 miles per hour and bob's was 4 miles per hour, how many miles had bob walked when they met? ]

in geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. by extension, a line and a plane, or two planes, in three-dimensional euclidean space that do not share a point are said to be parallel.