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Foundation Engineering

Soil Exploration

A soil sample...

Question

A soil sampler has inner and outer radii of 25 mm and 30 mm,respectively. The area ratio of the sampler is

A

24%

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B

34%

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C

44%

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D

54%

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Solution

The correct option is C 44%
$Area ratio = \frac{D_{0}^{2} - D_{i}^{2}}{D_{i}^{2}} \times 100$
$= \frac{(30)^{2} - (25)^{2}}{(25)^{2}} \times 100 = 44 %$

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