The length of a strip measured with a metre rod is 10.0 cm. Its width measured with a vernier calipers is 1.00 cm. The least count of the metre rod is 0.1 cm and that of vernier calipers is 0.01 crn. What will be error in its area?

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± 13%

± 7%

± 4%

± 2%

answer is .

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Detailed Solution

Area of strip = lb∴ ΔAA×100=Δll×100+Δbb×100=0.110×100+0.011×100=±2%

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