Percentage error in pressure when a force acts on a square plate

The same question, asked 2 times: 25 Apr 2025 S2*, 17 Apr 2026 S2. Every wording below, oldest first.

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Question 1
25 Apr 2025 S2
2 $F$
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Question 2
17 Apr 2026 S2
102 $A force 'F' is applied on a square plate of side 'L'. If the percentage error in determining 'L' is 3% and that in 'F' is 2% then the percentage error in determining the pressure is$
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