question: Iain first walks west and then south looking for a petrol station.
  
  If he is now $h$ km directly from his starting point, find the value of $h$.
query_wo: Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
  Question: Iain first walks west and then south looking for a petrol station.
  
  If he is now $h$ km directly from his starting point, find the value of $h$.
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: Iain first walks west and then south looking for a petrol station.
  
  If he is now $h$ km directly from his starting point, find the value of $h$.
question_for_eval: Iain first walks west and then south looking for a petrol station.
  
  If he is now $h$ km directly from his starting point, find the value of $h$.