Sunil weighs 150 pounds and would like to lose a little weight by replacing his sugary beverages with water or black tea and adding brisk walking to his normally sedentary life. If these measures decreased his former calorie intake by 250 calories a day and increased his energy expenditure by 250 calories a day, how long would it take Sunil to lose about one pound?

About 1 week or 7 days

Explanation:

According to the 3500 calorie rule, one person can lose about 3500 calories or 1 pound in a week if a person cut his 500 calories everyday.

In the given question, if the person loses 500 calorie everyday by no consuming 250 calorie and exercise to lose bout 250 calories. This results in the loss of about 500 calorie per day and as a result of this the person will lose 1 pound of his weight in about 7 days.

Thus, 1 week or 7 days is correct.

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