Hello, your first post has conflicting information, first you saythen your calculation statesThere is 3.6 litres of water added to the 30 litresWhich i did not pick up on at first, i do apologise.Calculated = 60*(30+3.5)/30
If your data is 3.5 then the result is 67.0
If your data is 3.6 then the result is 67.2
Does that help?




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