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From the table given, determine what is the increase in pollution from 2005 to 2006 in the river that has higher pollution. BOD level mg/litre River B in Uttaranchal 2005 55 2006 85 River D in Uttaranchal 2005 66 2006 99

From the table given, determine what is the increase in pollution from 2005 to 2006 in the river that has higher pollution. BOD level mg/litre River B in Uttaranchal 2005 55 2006 85 River D in Uttaranchal 2005 66 2006 99 Correct Answer 33

Given:

River with higher pollution = River D

Calculation:

BOD level mg/l in 2005 of river D = 66 

BOD level mg/l in 2006 of river D = 99 

∴ Increase in the BOD level mg/l = 99 - 66 = 33 

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