A person with a mass of 75kg and a height of 183m is exercis

A person with a mass of 75kg and a height of 1.83m is exercising. In 1.5 hours of exercise, they burn 260L of oxygen. What is the metabolic rate of their activity?

a.427 Cal/hr m²

b.197 Cal/hr m²

c.361 Cal/hr m²

d.511 Cal/hr m²

e.482 Cal/hr m²

f.631 Cal/hr m²

Solution

427 cal/hr m2

1liter of oxygen consumption gives 4.8 kcal of heat released.
So for 260g of O2 consumed
        260 * 4.8 Kcal = 1248 Kcal

Exercise takes 1.5 hours
           1248/1.5 = 13.86 kcal/hr

By using Weight 75kg and height 1.83m
the suface area = 1.97m2

           13.86/1.97 = 422 kcal/m2. h