Question

An ice cream has a marked value of $700kcal$. How many kilowatt-hour of energy will it deliver to the body as it is digested

• A. $0.81kwh$
• B. $0.90kwh$
• C. $1.11kwh$
• D. $0.71kwh$

Answer 1

The correct option is A

$0.81kwh$

Step1: Given data.

Amount of energy delivered by given ice cream to the body $=700kcal$

Step2 Finding kilowatt-hour of energy deliver to the body.

We know that,

$\Rightarrow$$1kcal={10}^{3}Calorie=4200J=\frac{4200}{3.6\times {10}^6}kWh$

Now,

According to the question:

$700kcal=\frac{700\times 4200}{3.6\times {10}^6}kwh$

$=0.81kwh$

Hence, option A is correct.