 law of dimension marginal utility. Under marginal utility we study change in utility because of change in consumption of a particular commodity and marginal utility is an important concept in economics where we study increment in total utility because of the consumption of a particular commodity. But with reference to marginal utility we always see law of dimension marginal utility operates. This law of dimension marginal utility states that the increment in total utility diminishes as its additional unit are consumed by a particular consumer. So consistent usage of a particular commodity results in increase in marginal utility at a decreasing rate. Even if someone is using his favorite drink the consistent usage of that favorite drink within a specific period of time results in dissatisfaction. After point of saturation if a consumer uses that unit of the commodity he gets certain level of dissatisfaction. For example even during the hot summer season if someone uses a sugar cane juice to quench his thirst it might be possible that after reaching fourth or fifth glass of sugar cane drink it results in dissatisfaction for him. For similar in the same table that we have used earlier to get the in the first column we are reporting quantity of oranges total utility in the second column and marginal utility in third column. By looking at the marginal utility we can see if for each successive unit of orange total utility marginal utility decreases. For example for the first unit of orange marginal utility is equal to 20 while for the second unit of orange it becomes 10. And this declining trend is continuous up to 11 unit of orange. Even against 11th unit of orange marginal utility becomes 0 and after 11th unit of oranges marginal utility becomes negative. The thing that is important to each successive unit when a consumer use it results in increase in total utility at a decreasing rate. This increase in total utility at a decreasing rate is called as law of diminishing marginal utility. And same we are reporting here in this figure the marginal utility against first unit of orange is highest while it becomes lowest when consumer used 12th unit of orange even it becomes negative. And here saturation point of saturation play an important role to make the marginal utility negative.