The moisture content of sludge is reduced from 90% to 80% in a sludge digestion

Question

The moisture content of sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is

Options:

A . 0.5

B . 0.1

C . 0.25

D . 0.05

Answer: Option A

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