The required time consumed to burn the calories gained from the slice of pizza is 1.36 hr.
Given that,
A slice of pizza supplies 217 kcal (217 cal). if a person weighing 140 lb expends 80 kcal per mile when walking at 2.0 miles per hour.
here,
1 mile = 80 kcal used,
1 kcal used = 1/80 mile
217 kcal used = 217/80 mile = 2.71 miles
Now,
2 miles = 1 hour,
2.71 miles = 2.71/2 hours
2.71 miles = 1.36 hours
Thus, the required time consumed to burn the calories gained from the slice of pizza is 1.36 hr.
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