Q: 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 perimeter of a semi circle is 180 cm then the radius is ? 
Options: a ) 22 , b ) 28 , c ) 35 , d ) 37 , e ) 13
A:
c