In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Problem: the inner circumference of a circle race track 18 m wide is 880 m . find the radius of the outer circle .
Options: ['a ) 120 m', 'b ) 145 m', 'c ) 130 m', 'd ) 140 m', 'e ) 122 m']
d