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The degree of disturbance of the sample collected by the sampler is expressed by a term called the “area ratio”. If the outer diameter and inner diameter of the sampler are D0 and Di respectively, the area ratio is given by
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D02 - Di2 Di2 -
Di2 - D02 Di2 -
D02 - Di2 D02 -
Di2 - D02 D02
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Correct Option: A
Di2 |