Problem Solving

Runners \(X\) and \(Y\) started an \(18\)-mile race at the same time. Runner \(X\) completed the course in \(6\) hours, and Runner \(Y\) finished \(2\) hours earlier. Runner \(Y\) ran an average of how many miles per hour faster than Runner \(X?\)

A. \(1\)

B. \(1\dfrac{1}{2}\)

C. \(2\dfrac{1}{4}\)

D. \(3\)

E. \(4\dfrac{1}{2}\)

The OA is B