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Question : The BOD of some water samples are below. (a) sample 1 -200(mg)/L(b) Sample 2 - 80(mg)/L(c) Sample 3 - 300(mg)/L(d) Sample 4 - 25(mg)/L . Which of the above water sample polluted ? |
| Answer» SOLUTION :Sample 3 - 300`(MG)/L` | |