Question

The daily intake of a human adult is nearly ${10}^7\text{J}$. Its value in kilocalorie will be approximately

• A. $2400$
• B. $2000$
• C. $1200$
• D. $10000$

Answer 1

The correct option is A $2400$

Using the relation between $\text{joule}$ and $\text{kcal}$ we get ${10}^7\text{J}$ as,

$E\text{(kcal)}=\frac{{10}^7}{4.2\times {10}^3}$

$=\frac{10000}{4.2}$

$\approx 2400$