Question

The energy content of different foods are as follows

Food	Energy content per kg
Wheat Rice Potatoes (cooked ) Milk	3.2 Joules 5.3 Joules 3.7 Joules 3.0 Joules

Which food provides the least energy and which provides the maximum?
Calculate the ratio of least energy to the maximum energy.

Answer 1

From the above table it is clear that milk provides the least energy and rice provides the maximum.
$$ \therefore $$ ratio of the least energy to the maximum energy
$$\Rightarrow \dfrac { the \quad least \quad energy}{ the \quad maximum \quad energy } = \dfrac {3}{5.3} = \dfrac { 3 \times 10}{ 5.3 \times 10} = \dfrac {30}{53} $$