Two people moving towards each other (or opposite ways on a circular track): time to meet

This type of question, asked 2 times: 8 Aug 2022 Tier II, 18 Jan 2025 Tier II. All 2 questions below, oldest first.

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Question 1
8 Aug 2022 Tier II
91 $Vinay and Mahesh are 250 metres apart from each other. They are moving towards each other with the speed of 36 km/hr and 54 km/hr respectively. In how much time will they meet each other?$
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Question 2
18 Jan 2025 Tier II
23 $On a 2200 m long circular track, Sarita and Kavita drove their cycles from the same point but in opposite direction with the speeds 20 km/hr and 16 km/hr, respectively. After how much time will they meet again for the first time?$
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Question 1