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19 May, 13:08

If a person uses about 4 calories to fuel a minute of walking, and it takes about 20 minutes to walk a mile, approximately how many miles must a person walk to utilize the energy in ("burn") a pound of fat?

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  1. 19 May, 13:16
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    43.75 miles must a person walk to utilize the energy in ("burn") a pound of fat.

    Explanation:

    3,500 calories are present in 1 pound of the fat.

    Thus, given that:

    4 calories are burnt in 1 minute of walking.

    So,

    1 calories are burnt in 1/4 minute of walking.

    Or,

    1 calories are burnt in 0.25 minute of walking.

    Thus,

    3500 calories are burnt in 0.25*3500 minutes of walking

    Minutes of walking needed to burn 3500 calories = 875 minutes.

    Also, given that:

    20 minutes of walking covers 1 mile.

    1 minute of walking covers 1/20 mile.

    So,

    875 minutes of walking covers (1/20) * 875 mile.

    43.75 miles must a person walk to utilize the energy in ("burn") a pound of fat.
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