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Basic Definitions

The value of ...

Question

The value of porosity of a soil sample in which the total volume of soil grains is equal to twice the total volume of voids would be

A

30%

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B

40%

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C

50%

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D

60%

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Solution

The correct option is A 30%
(a)

$V_{S} = 2 V_{V}$ (given)

$n = \frac{V_{V}}{V_{T}}$

$V_{T} = V_{S} + V_{V} = 2 V_{V} + V_{V} = 3 V_{V}$

$n = \frac{V_{V}}{3 V_{V}} = \frac{1}{3} = 33.33 %$

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