During a rescue search, a helicopter flew b kilometres west from point X to point Y, then changed course and flew 10.7 kilometres north to point Z. If point Z is on a bearing of 335° T from point X:

Now, if the distance that the helicopter must fly between point Z and point X is d kilometres, calculate d to one decimal place.
Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: During a rescue search, a helicopter flew b kilometres west from point X to point Y, then changed course and flew 10.7 kilometres north to point Z. If point Z is on a bearing of 335° T from point X:

Now, if the distance that the helicopter must fly between point Z and point X is d kilometres, calculate d to one decimal place.
Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: During a rescue search, a helicopter flew b kilometres west from point X to point Y, then changed course and flew 10.7 kilometres north to point Z. If point Z is on a bearing of 335° T from point X:

Now, if the distance that the helicopter must fly between point Z and point X is d kilometres, calculate d to one decimal place.