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Force and area are measured as 20 N and 5m2 with errors 0.05N and 0.0125m2 . The maximum error in pressure is (SI unit)

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a

4±0.0625

b

4±0.05

c

4±0.125

d

4±0.02

answer is D.

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Detailed Solution

P=FA=205=4pa ⇒ΔPP=ΔFF+ΔAA ⇒ΔP=P(ΔFF+ΔAA)=205(0.0520+0.01255)=4(0.0025)=0.02

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