question: A square prism has a side $GF$ of length 15cm as shown.
  
  Now, we want to find $y$, the length of the diagonal $DF$.
  
  Calculate $y$ to two decimal places.
  
query_wo: Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
  Question: A square prism has a side $GF$ of length 15cm as shown.
  
  Now, we want to find $y$, the length of the diagonal $DF$.
  
  Calculate $y$ to two decimal places.
  
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: A square prism has a side $GF$ of length 15cm as shown.
  
  Now, we want to find $y$, the length of the diagonal $DF$.
  
  Calculate $y$ to two decimal places.
  
question_for_eval: A square prism has a side $GF$ of length 15cm as shown.
  
  Now, we want to find $y$, the length of the diagonal $DF$.
  
  Calculate $y$ to two decimal places.
  