The moisture content of a sludge is reduced from 90% to 80% in a sludg – McqOptions

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1.	The moisture content of a sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is
A.	0.25
B.	0.5
C.	0.1
D.	5%.
Answer» C. 0.1

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