Question

If an athlete expends 3480. kJ/h, how long does she have to play to work off 1.00 lb of body fat? Note that the nutritional calorie (Calorie) is equivalent to 1 kcal, and one pound of body fat is equivalent to about 4.10 × 103 Calories.

Answer 1

The time required by the Athlete to work off 1.00 lb of body fat = 0.296 minute

Step-by-step explanation:

1 lb of body fat = 4.1 k cal

1 k cal = 4.184 Kilo joule

1 lb of body fat = 4.1 × 4.184 = 17.1544 Kilo joule

Athlete expends 3480 Kilo joule in one hour

⇒ Time required to expand 3480 Kilo joule = 60 minute

⇒ Time required to expand 1 Kilo joule =
`(60)/(3480)`
`(min)/(KJ)`

⇒ Time required to expand 17.1544 Kilo joule =
`(60)/(3480)` × 17.1544 = 0.296 min

Therefore the time required by the Athlete to work off 1.00 lb of body fat = 0.296 minute