New angular momentum when the frequency and kinetic energy of a rotating body change

The same question, asked 2 times: 4 May 2023 S1*, 18 Apr 2026 S1. Every wording below, oldest first.

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Question 1
4 May 2023 S1
12 $L$
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Question 2
18 Apr 2026 S1
105 $The angular momentum of a rotating body is 'L'. When the frequency of rotating body is tripled and its kinetic energy is made one-third, the new angular momentum becomes$
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