Sonometer wire in resonance with the same fork after a change in setting: vibrating length

The same question, asked 2 times: 11 May 2023 S1*, 25 Apr 2025 S1. Every wording below, oldest first.

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Question 1
11 May 2023 S1
31 $At the poles of earth, a stretched wire of a given length vibrates in unison with a tuning fork. At the equator of earth, for same setting, to produce resonance with same fork, the vibrating length of wire$
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Question 2
25 Apr 2025 S1
41 $At poles, a stretched wire of a given length vibrates in unison with a tuning fork. At the equator, for same setting, to produce resonance with same fork, the vibrating length of wire$
Tap an option to check your answer.

Question 1