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An ice cream has a marked value of 700 k...

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

A

0.81kWh

B

0.90kWh

C

1.11kWh

D

0.71kWh

Text Solution

Verified by Experts

The correct Answer is:
A
1kcal = 1000 cal = 4200J
kWh = `3.6 xx10^6 J`
`700 kcal = (700 xx4200)/(3.6xx10^6)=(7xx42)/(36) xx10^(-1)`
`= (49)/6 xx10^(-1) = 0.81 kWh`
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