GATE CE 2018 Set 1 — Question 31
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Geotechnical Engineering → Subsurface Investigation → Soil Sampling
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Question
A core cutter of height has inner and outer diameters of and , respectively. The area ratio of the core cutter (in %, up to two decimal places) is ______
Correct answer
12.3 to 12.4
Solution
The area ratio of a sampler (like a core cutter) is defined as the ratio of the area of the metal cross-section to the area of the soil sample, expressed as a percentage:Given:
Outer diameter,
Inner diameter, Substituting the values:The area ratio of the core cutter is .
Outer diameter,
Inner diameter, Substituting the values:The area ratio of the core cutter is .
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