Civil Engineering > GATE 2015 SET-2 > Water Treatment
Ultimate BOD of a river water sample is 20 mg/L. BOD rate constant (natural log) is 0.15 day-1. The respective values of BOD (in %) exerted and remaining after 7 days are:
A
45 and 55
B
55 and 45
C
65 and 35
D
75 and 25

Correct : c

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