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A force F is applied on a square plate of side L. If the percentage error in the determination of L is 2% and that in F is 4%. What is the permissible error in pressure?

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Detailed Solution

$P = \frac{F}{A} = \frac{F}{L^{2}} = {FL}^{- 2} % error in pressure = (% error in F) + 2 (% error in L) = (4 %) + 2 (2 %) = 8 %$

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