The moisture content of sewage sludge of two samples was reduced as follows:

Sample A: 97% to 95%
Sample B: 98% to 96%

Select the correct inference.

The decrease in volume for samples A and B is the same = 60%

The decrease in volume for samples A and B in the same = 50%

There is a decrease in volume of 60% for Sample A and 50% for sample B

There is an increase in volume of 60% for sample A and 50% for sample B

The correct answer is `No. 3: There is a decrease in volume of 60% for Sample A and 50% for sample B`

Equation of sludge digestion tank

V₁(100-P₁)= V₂(100-P₂)

Where V1 and V2, represent the volumes before and after dewatering,

p1 and p2, are per cent moisture before and after dewatering, respectively.

For sample A

V₁(100-P₁)= V₂(100-P₂)

V₁(100-97)= V₂(100-95)

V₂ = 3V₁/5

$egin{array}{l} Delta {V_A} = { m{ }}frac{{left( {{V_1} - { m{ }}{V_2}} ight)}}{{{V_1}}} imes 100\ \ = frac{{left( {{V_1} - { m{ }}3/5{V_1}} ight)}}{{{V_1}}} imes 100 end{array}$

ΔV_A = 40%

Total decrease in the volume = 60%

For sample A

V₁(100-P₁)= V₂(100-P₂)

V₁(100-98)= V₂(100-96)

V₂ = V₁/2

$egin{array}{l} Delta {V_A} = { m{ }}frac{{left( {{V_1} - { m{ }}{V_2}} ight)}}{{{V_1}}} imes 100\ \ = frac{{left( {{V_1} - { m{ }}1/2{V_1}} ight)}}{{{V_1}}} imes 100 end{array}$

ΔV_A = 50%

Total decrease in the volume = 50%

The moisture content of sewage sludge of two samples was reduced as follows:

Sample A: 97% to 95%
Sample B: 98% to 96%

Select the correct inference.

The decrease in volume for samples A and B is the same = 60%

The decrease in volume for samples A and B in the same = 50%

There is a decrease in volume of 60% for Sample A and 50% for sample B

There is an increase in volume of 60% for sample A and 50% for sample B

The correct answer is `No. 3: There is a decrease in volume of 60% for Sample A and 50% for sample B`

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The moisture content of sewage sludge of two samples was reduced as follows: Sample A: 97% to 95% Sample B: 98% to 96% Select the correct inference.

The decrease in volume for samples A and B is the same = 60%

The decrease in volume for samples A and B in the same = 50%

There is a decrease in volume of 60% for Sample A and 50% for sample B

There is an increase in volume of 60% for sample A and 50% for sample B

The correct answer is No. 3: There is a decrease in volume of 60% for Sample A and 50% for sample B

The moisture content of sewage sludge of two samples was reduced as follows:

Sample A: 97% to 95%
Sample B: 98% to 96%

Select the correct inference.

The correct answer is `No. 3: There is a decrease in volume of 60% for Sample A and 50% for sample B`