question: The diagram shows a cone with a slant height of 13 m. The radius of the base of the cone is denoted by $r$.
  
  Find the value of $r$.
query_wo: Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
  Question: The diagram shows a cone with a slant height of 13 m. The radius of the base of the cone is denoted by $r$.
  
  Find the value of $r$.
query_cot: Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
  Question: The diagram shows a cone with a slant height of 13 m. The radius of the base of the cone is denoted by $r$.
  
  Find the value of $r$.
question_for_eval: The diagram shows a cone with a slant height of 13 m. The radius of the base of the cone is denoted by $r$.
  
  Find the value of $r$.