# Help with this cal question?

## A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How many Calories would a 175 lb person burn during 7 hours of sleep? (Note that 1 Cal = 1 kcal.) Answer:__ Cal

Chemical energy burnt for $0.45 \setminus C a l \cdot {h}^{-} 1$ for every pound of body weight
$\implies$A $175 \setminus l b$ person burns $= 0.45 \times 175 = 78.75 \setminus C a l \cdot h {r}^{-} 1$
$\therefore$ In 7 hours a $175 \setminus l b$ person burns $= 7 \times 78.75 = 551.25 \setminus C a l$