The sides of a rectangular glass plate are measured as (5.0 ± 0.1) cm and (2.0 ± 0.1) cm. What is the percentage error in its area?

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The sides of a rectangular glass plate are measured as $(5.0 \pm 0.1)\ \text{cm}$ and $(2.0 \pm 0.1)\ \text{cm}$ . What is the percentage error in its area?

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