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What is the relative error of an observation taken by an ultrasonic sensor which predicts the distance of an object to be 2.3 cm but the actual value is 2.1cm?

What is the relative error of an observation taken by an ultrasonic sensor which predicts the distance of an object to be 2.3 cm but the actual value is 2.1cm? Correct Answer 0.0869

GiveActual Value=2.3cm Measured Value=2.1cm Absolute error=Measured Value-Actual Value Absolute error=2.3cm-2.1cm=>0.2cm Relative error=Absolute error/Actual value Relative error=0.2/2.3=>0.0869

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