worth of food everyday. His food contains 
of butter plus a plate of sweets everyday, besides items which provide him with other nutrients (proteins, vitamins, minerals, etc.) in addition to fats and carbohydrates. The caloric value of 10 g of butter is 
and that of a plate of sweets is of average 
.What dietary strategy should he adopt to cut down his calories to about 
per day? Assume the man cannot resist eating the full plate of sweets once it is offered to him!
Answer:
The man intends to cut down 3000-2100 = 900 kcal. But avoiding sweets completely, he will cut down 700 kcal. To cut down another 200 kcal, he should cut down butter by \[\frac{10}{60}\times 200=33\,g\]per day. He should not cut down consumption of food, that provides him with vitamins and other vital nutrients.
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